A Guide to Illinois Watch Co. size 12 watches, Grade 273.
Run.
Date
From
To
Total
H/O
Jls
Adj.
Run.
Date
From
To
Total
H/O
Jls
Adj.
1
1904
1,748,901
1,749,000
100
H
17
Adj.
96
1911
2,344,901
2,345,000
100
H
17
Adj.
2
1904
1,749,301
1,749,320
20
H
19
Adj. T & P
97
1911
2,346,001
2,346,320
320
H
17
Adj.
3
1904
1,749,321
1,749,480
160
H
17
Adj.
98
1911
2,346,321
2,346,340
20
H
19
Adj.
4
1904
1,749,561
1,749,640
80
O
17
Adj.
99
1911
2,346,341
2,346,400
60
H
17
Adj.
5
1904
1,749,641
1,749,660
20
O
19
Adj. T & P
100
1911
2,354,051
2,354,090
40
O
17
Adj.
6
1905
1,777,001
1,777,300
300
O
17
Adj.
101
1911
2,355,501
2,354,600
100
O
17
Adj.
7
1905
1,780,601
1,780,800
200
H
17
Adj.
102
1911
2,355,601
2,355,700
100
O
17
3 Pos.
8
1905
1,781,101
1,781,260
160
O
17
Adj.
103
1911
2,355,701
2,355,800
100
O
17
Adj.
9
1905
1,781,261
1,781,300
40
O
19
Mixed
104
1911
2,365,201
2,365,400
200
O
17
Adj.
10
1905
1,781,601
1,781,700
100
H
19
Mixed
105
1911
2,386,161
2,386,170
10
O
19
Adj.
11
1905
1,790,091
1,790,100
10
H
17
Adj.
106
1911
2,386,201
2,386,300
100
O
17
Adj.
12
1905
1,821301
1,821,400
100
H
17
Adj.
107
1912
2,424,041
2,424,090
50
H
17
Adj.
13
1905
1,822,501
1,822,600
100
O
17
Adj.
108
1912
2,424,801
2,424,850
50
O
17
Adj.
14
1905
1,842,501
1,842,600
100
H
17
Adj.
109
1912
2,434,401
2,434,500
100
O
17
Adj.
15
1906
1,846,401
1,846,500
100
O
17
Adj.
110
1912
2,442,401
2,442,900
500
O
17
Mixed
16
1906
1,849,501
1,849,600
100
O
17
Adj.
111
1912
2,450,101
2,450,130
30
H
19
Adj.
17
1906
1,855,601
1,855,800
200
H
17
Adj.
112
1912
2,450,201
2,450,240
40
H
19
T & 3 Pos.
18
1906
1,858,801
1,859,000
200
O
17
Adj.
113
1912
2,450,241
2,450,270
30
H
19
T & 3 Pos.
19
1906
1,859,451
1,859,460
10
H
19
Adj. T & P
114
1912
2,450,271
2,450,280
10
H
19
Adj.
20
1906
1,862,801
1,862,900
100
O
17
Adj.
115
1912
2,450,281
2,450,290
10
H
17
Adj.
21
1906
1,866,701
1,866,900
200
H
17
Adj.
116
1912
2,450,901
2,451,000
100
O
17
Adj.
22
1906
1,866,901
1,867,000
100
O
17
Adj.
117
1912
2,460,001
2,460,100
100
O
17
Adj.
23
1906
1,872,901
1,873,000
100
H
17
Adj.
118
1912
2,475,001
2,475,300
300
H
17
Adj.
24
1906
1,881,571
1,881,590
20
O
19
Adj.
119
1912
2,475,301
2,475,400
100
H
17
Adj.
25
1906
1,881,591
1,881,600
10
H
19
Adj.
120
1912
2,475,401
2,475,500
100
H
17
Adj.
26
1906
1,893,801
1,893,900
100
O
17
Adj
121
1912
2,488,601
2,488,700
100
O
17
Adj.
27
1906
1,893,901
1,894,000
100
O
19
Adj.
122
1912
2,499,701
2,500,000
300
H
17
Adj.
28
1906
1,901,501
1,901,600
100
O
19
Adj.
123
1912
2,500,001
2,500,100
100
H
17
Adj.
29
1906
1,901,601
1,902,000
400
O
17
Adj.
124
1912
2,500,901
2,501,300
400
O
17
Adj.
30
1906
1,904,601
1,904,700
100
H
17
Adj.
125
1913
2,511,001
2,511,200
200
O
17
3 Pos.
31
1906
1,911,701
1,912,000
300
O
17
Adj.
126
1913
2,511,601
2,511,900
300
H
17
3 Pos.
32
1906
1,914,121
1,914,140
20
H
19
Adj.
127
1913
2,515,311
2,515,320
10
O
17
Adj.
33
1906
1,919,901
1,920,000
100
O
17
Adj.
128
1913
2,543,181
2,543,260
80
H
17
Adj.
34
1906
1,921,901
1,921,950
50
H
17
Adj.
129
1913
2,543,261
2,543,290
30
O
17
Adj.
35
1906
1,922,801
1,923,000
200
H
17
Adj.
130
1913
2,543,481
2,543,500
20
O
21
Adj.
36
1906
1,928,901
1,929,000
100
O
17
Adj.
131
1913
2,561,701
2,561,800
100
O
17
Adj.
37
1907
1,964,401
1,964,700
300
O
17
Adj.
132
1914
2,609,601
2,609,800
200
O
17
Adj.
38
1907
1,969,101
1,969,300
200
H
17
Adj.
133
1914
2,623,801
2,623,860
60
O
17
Adj.
39
1907
1,969,301
1,969,400
100
H
17
Adj.
134
1914
2,631,251
2,631,290
40
O
17
Adj.
40
1907
1,969,401
1,969,600
200
H
17
Adj.
135
1915
2,699,451
2,699,500
50
O
17
Adj.
41
1907
1,969,801
1,970,000
200
O
17
Adj.
136
1915
2,699,551
2,699,600
50
O
17
Adj.
42
1907
1,985,001
1,985,500
500
O
17
Adj.
137
1915
2,699,801
2,699,840
40
O
17
Adj.
43
1907
2,004,001
2,004,400
400
H
17
Adj.
138
1915
2,769,051
2,769,070
20
H
17
Adj.
44
1907
2,011,001
2,011,300
300
O
17
Adj.
139
1915
2,799,341
2,799,350
10
O
17
Adj.
45
1907
2,024,911
2,024,920
10
O
19
Adj. T & P
140
1915
2,799,351
2,799,360
10
O
19
Adj. T & P
46
1907
2,024,921
2,024,940
20
O
17
Adj.
141
1915
2,799,711
2,799,730
20
O
17
Adj.
47
1908
2,032,261
2,032,300
40
O
17
Adj.
142
1916
2,881,001
2,881,350
350
O
17
Adj.
48
1908
2,032,321
2,032,340
20
H
19
Adj.
143
1916
2,881,351
2,881,500
150
H
17
Adj.
49
1908
2,074,901
2,075,000
100
H
17
Adj.
144
1916
2,940,391
2,940,420
30
O
17
Adj.
50
1908
2,098,891
2,098,900
10
O
19
Adj. T & P
145
1916
2,940,421
2,940,450
30
H
17
Adj.
51
1908
2,110,401
2,110,500
100
O
17
T & 3 Pos.
146
1916
3,002,001
3,002,200
200
O
17
Adj.
52
1908
2,124,031
2,124,080
50
O
17
Adj.
147
1916
3,040,601
3,040,700
100
H
17
Adj.
53
1908
2,124,111
2,124,120
10
H
17
Adj.
148
1916
3,040,861
3,040,940
80
O
17
Adj.
54
1909
2,131,291
2,131,300
10
H
19
Adj.
149
1916
3,056,001
3,056,400
400
O
17
Adj.
55
1909
2,132,751
2,132,900
150
O
19
Adj.
150
1916
3,056,401
3,056,500
100
H
17
Adj.
56
1909
2,132,901
2,133,115
215
O
17
Adj.
151
1917
3,115,501
3,116,100
600
O
17
Adj.
57
1909
2,133,156
2,133,190
35
H
17
Adj.
152
1917
3,120,401
3,120,600
200
H
17
Adj.
58
1909
2,151,141
2,151,160
20
O
17
Adj.
153
1917
3,130,401
3,130,500
100
O
17
Adj.
59
1909
2,151,161
2,151,190
30
O
19
Adj. T & P
154
1917
3,139,201
3,139,250
50
H
17
Adj.
60
1909
2,151,651
2,151,670
20
H
19
Adj.
155
1917
3,139,981
3,139,990
10
O
17
Adj.
61
1909
2,152,301
2,152,400
100
O
17
Mixed
156
1917
3,145,141
3,145,170
30
O
17
Adj.
62
1909
2,152,501
2,152,700
200
H
17
Adj.
157
1917
3,172,901
3,173,000
100
H
17
Adj.
63
1909
2,202,451
2,202,500
50
O
17
Adj.
158
1918
3,261,801
3,262,000
200
O
17
Adj.
64
1909
2,202,501
2,202,520
20
H
19
Adj.
159
1918
3,277,901
3,277,960
60
O
17
Adj.
65
1909
2,202,991
2,203,000
10
H
17
Adj.
160
1918
3,309,411
3,309,460
50
H
17
Adj.
66
1910
2,223,301
2,223,400
100
O
17
Adj.
161
1918
3,312,531
3,312,580
50
O
17
Adj.
67
1910
2,229,201
2,229,500
300
H
17
Adj.
162
1918
3,319,201
3,319,300
100
O
17
Adj.
68
1910
2,234,501
2,234,700
200
O
17
Adj.
163
1918
3,338,851
3,338,900
50
H
17
Adj.
69
1910
2,235,001
2,235,040
40
O
17
Adj.
164
1918
3,399,271
3,399,300
30
H
17
Adj.
70
1910
2,243,701
2,243,900
200
O
17
Adj.
165
1918
3,399,901
3,400,000
100
H
17
Adj.
71
1910
2,247,511
2,247,560
50
O
17
Adj.
166
1918
3,414,101
3,414,180
80
O
17
Adj.
72
1910
2,247,561
2,247,580
20
O
19
Adj. T & P
167
1919
3,461,101
3,461,300
200
O
17
Adj.
73
1910
2,247,631
2,247,740
110
H
17
Adj.
168
1919
3,522,301
3,522,500
200
O
17
Adj.
74
1910
2,247,741
2,247,760
20
H
19
Adj. T & P
169
1919
3,566,001
3,566,200
200
O
17
Adj.
75
1910
2,250,901
2,251,000
100
H
17
Adj.
170
1919
3,639,501
3,639,700
200
O
17
Adj.
76
1910
2,258,101
2,258,300
200
O
17
3 pos.
171
1920
3,675,151
3,675,400
250
H
17
Adj.
77
1910
2,260,081
2,260,100
20
O
17
Adj.
172
1920
3,685,301
3,685,700
400
O
17
Adj.
78
1910
2,260,101
2,260,110
10
O
19
Adj.
173
1920
3,734,601
3,735,000
400
O
17
Adj.
79
1910
2,260,391
2,260,410
20
H
17
Adj.
174
1920
3,738,001
3,738,300
300
O
17
Adj.
80
1910
2,260,901
2,260,950
50
H
17
Adj.
175
1920
3,798,501
3,799,000
500
H
17
Adj.
81
1910
2,260,951
2,261,000
50
H
19
Adj. T & P
176
1921
3,812,001
3,813,000
1,000
O
17
Adj.
82
1910
2,270,501
2,271,000
500
O
17
Adj.
177
1921
3,843,001
3,843,500
500
O
17
Adj.
83
1910
2,276,001
2,276,200
200
O
17
Adj.
178
1921
3,846,001
3,846,400
400
H
17
Adj.
84
1910
2,281,301
2,281,600
300
H
17
Adj.
179
1921
3,872,001
3,873,100
1,100
O
17
Adj.
85
1910
2,286,601
2,286,900
300
O
17
Adj.
180
1922
3,999,201
4,000,000
800
O
17
Adj.
86
1910
2,290,701
2,291,000
300
H
17
Adj.
181
1922
4,000,001
4,000,100
100
O
17
Adj.
87
1910
2,300,531
2,300,580
50
O
17
Adj.
182
1922
4,004,901
4,005,000
100
H
17
Adj.
88
1911
2,314,401
2,314,700
300
O
17
Adj.
183
1922
4,011,001
4,011,200
200
H
17
Adj.
89
1911
2,315,081
2,315,100
20
O
19
Adj. T & P
184
1922
4,011,201
4,011,600
400
H
17
Adj.
90
1911
2,325,101
2,325,300
200
H
17
Adj.
185
1922
4,032,001
4,032,500
500
O
17
Adj.
91
1911
2,328,201
2,328,650
450
O
17
Adj.
186
1922
4,053,651
4,054,000
350
O
17
Adj.
92
1911
2,335,401
2,335,700
300
O
17
Adj.
187
1922
4,067,501
4,068,500
1,000
O
17
Adj.
93
1911
2,337,901
2,338,000
100
H
17
Adj.
188
1922
4,068,501
4,068,600
100
O
17
Adj.
94
1911
2,340,001
2,340,150
150
H
17
Adj.
189
1922
4,140,201
4,140,600
400
O
17
Adj.
95
1911
2,344,001
2,344,200
200
O
17
Adj.
190
1923
4,175,001
4,175,600
600
O
17
Adj.
 
 
 
 
 
 
 
   
Total
30,880
 
Name
H/O
Estimate
Name
H/O
Estimate
Accuratus
17 Jewels O.F.
100
Landis Watch Co. Chicago USA 'King Landis'
17 Jewels O.F.
185
Ariston, [made for Marshall Field & Co.]
17 Jewels O.F.
80
Lebolt & Company, New York-Chicago.
17 Jewels O.F.
100
Ariston, [made for Marshall Field & Co.]
19 Jewels H.
90
Lebolt & Company, New York
17 Jewels O.F.
50
E E Barber
17 Jewels O.F.
25
Lexington Watch Co. Providence R. I.[made for Baird-North Co.]
17 Jewels O.F.
400
Wm. Barthman, New York G.B.
17 Jewels O.F.
100
Lexington Watch Co. Providence R. I.[made for Baird-North Co.]
17 Jewels H.
100
Hyman Berg & Co. Chicago
17 Jewels O.F.
50
Navigator Special
19 Jewels O.F.
70
H J Bridger, Brooklyn NY.
17 Jewels O.F.
20
Jos. M Parker Jr. Philadelphia
17 Jewels O.F.
10
Bohm-Allen Co. Denver
17 Jewels H.
100
Phelps & Perry, New York
17 Jewels O.F.
50
Benjamin Franklin [Oskamp-Nolting Co., Cincinnati Ohio]
17 Jewels O.F.
100
Precise
17 Jewels O.F.
150
G H Churchill, Amsterdam Ny.
17 Jewels H.
250
Railroad Dispatcher Special [made  for J M Roberts Pittsburgh]
19 Jewels O.F.
100
Conklin's Special
17 Jewels H.
100
Railroad Dispatcher Special [made  for J M Roberts Pittsburgh]
17 Jewels H.
10
Dependon, John V Farwell Co. Chicago U.S.A.
17 Jewels O.F.
50
W F Staley, Pittston PA.
17 Jewels O.F.
50
Dependon, John V Farwell Co. Chicago U.S.A.
17 Jewels H.
150
C Wm. Stentzel, Brooklyn NY.
17 Jewels O.F.
20
Ira D Garman, Philadelphia
17 Jewels O.F.
50
Stewart Special [made for Sproehnle  & Co Chicago]
17 Jewels O.F.
5,060
Chas.E.Graves & Co. Chicago
17 Jewels H.
100
Stewart Special [made for Sproehnle  & Co Chicago]
17 Jewels H.
1,650
E Gundlach & Co. Hartford Conn.
17 Jewels O.F.
25
Tappin's, Troy, N.Y.
17 Jewels O.F.
25
Herald Square, [made for R H Macy & Co. New York]
17 Jewels O.F.
90
G H Taylor Charlottetown P.E.I.
17 Jewels O.F.
10
Hardy & Hayes
17 Jewels O.F.
55
The Union Special [made for N Gamse New York]
17 Jewels O.F.
180
Hess & Culbertson Jewelry, St Louis
17 Jewels H.
70
The Union Special [made for N Gamse New York]
17 Jewels H.
100
J H Special (A J Heesen on Dial)
17 Jewels H.
10
Wanamaker 'Accuratus Series'
17 Jewels O.F.
80
George R Holmes, St Paul Minn.
17 Jewels O.F.
50
John Wanamaker
17 Jewels O.F.
110
Illinois Watch Co.
19 Jewels O.F.
20
John Wanamaker, Philadelphia-New York
17 Jewels O.F.
170
Illinois Watch Co.
19 Jewels H.
60
Washington Watch Co. 'Army and Navy' [Montgomery Ward]
19 Jewels O.F.
140
Illinois Watch Co.
17 Jewels O.F.
11,130
Washington Watch Co. 'Army and Navy' [Montgomery Ward]
19 Jewels H.
170
Illinois Watch Co.
17 Jewels H.
4,440
Washington Watch Co. 'Senate' [made for Montgomery Ward]
17 Jewels O.F.
1,040
Interstate Chronometer, [made for Sears - Roebuck & Co.]
17 Jewels O.F.
150
Washington Watch Co. 'Senate' [made for Montgomery Ward]
17 Jewels H.
700
Interstate Chronometer, [made for Sears - Roebuck & Co.]
17 Jewels H.
250
W  W  Wattles & Son Pittsburgh
17 Jewels O.F.
50
Landis Watch Co. Chicago USA 'Admiral'
17 Jewels H.
60
The Jos. Welf & Sons Co. Cleveland O.
17 Jewels H.
50
Landis Watch Co. Chicago USA 'King Landis'
19 Jewels O.F.
150
J Wiss & Sons Newark NJ.
17 Jewels O.F.
20
Serial numbers used on this page by the kind permission of
Russell W Snyder
Grade 273 Runs.
Grade 273 Movements found to date.
Last update 06/02/2018.
Grade 273,
17,19 jewels adjusted, manufactured from 1904 to 1923 a total of 30,880 movements in 190 runs make up this grade. Model 1 open faced and model
2 hunter; 3/4 plate movements of medium quality,  with double roller and patent micrometric regulator. Open faced 21,355 in 112 runs and Hunter
9,525 in 78 runs.

Observations,
The movements have mostly bright lined pattern demaskeening with the majority named Illinois Watch Co., named and private labels make up the
remainder.  

Variants,
Four types of escapement bridge can be found. The majority have the two fingered bridge, this changed to a full plate bridge in 1916. Washington
Watch Co., have a  full plate scalloped bridge; Interstate Chronometer have a split bridge. All the Stewart Special movements have the two fingered
bridge.

Description,
17,19 jewels, composition settings, compensating balance with timing screws, exposed escapement, patent micrometric regulator, best quality Swiss
Breguet hairspring, patent safety center pinion, Swiss mainspring, highly polished concave visible winding wheel, sunk second dial set in recessed of
plate, friction fitted dust band.
Movements in this grade.