A Guide to Illinois Watch Co. size 12 watches, Grade 127.
Run.
Date
From
To
Total
H/O
Jls
Adj.
Run.
Date
From
To
Total
H/O
Jls
Adj.
1
1927
4,974,801
4,975,000
200
O
17
Adj.
13
1932
5,493,001
5,493,900
900
O
17
Adj.
2
1927
4,978,001
4,979,500
1,500
O
17
Adj.
14
1932
5,493,901
5,494,400
500
O
17
Adj.
3
1930
5,369,001
5,369,600
600
O
17
Adj.
15
1932
5,494,401
5,495,000
600
O
17
Adj.
4
1930
5,369,601
5,370,200
600
O
17
Adj.
16
1932
5,520,001
5,521,300
1,300
O
17
Adj.
5
1930
5,370,201
5,371,000
800
O
17
Adj.
17
1932
5,521,301
5,522,000
700
O
17
Adj.
6
1930
5,386,001
5,387,000
1,000
O
17
Adj.
18
1932
5,533,001
5,535,000
2,000
O
17
Adj.
7
1931
5,413,001
5,415,000
2,000
O
17
Adj.
19
1932
5,553,001
5,554,400
1,400
O
17
Adj.
8
1931
5,424,001
5,425,000
1,000
O
17
Adj.
20
1932
5,554,401
5,554,700
300
O
17
Adj.
9
1931
5,445,001
5,447,000
2,000
O
17
Adj.
21
1932
5,554,701
5,555,000
300
O
17
Adj.
10
1931
5,468,001
5,469,400
1,400
O
17
Adj.
22
1932
5,570,001
5,572,000
2,000
O
17
Adj.
11
1931
5,469,601
5,469,700
100
O
17
Adj.
23
1932
5,581,001
5,582,100
1,100
O
17
Adj.
12
1931
5,469,901
5,470,000
100
O
17
Adj.
  Total
22,400
 
Name
H/O
Estimate
Name
H/O
Estimate
Hamilton USA  
17 Jewels O.F.
100
Illinois Watch Co.
17 Jewels O.F.
1,650
Illinois Central
17 Jewels O.F.
350
Sterling
17 Jewels O.F.
2,300
Illinois Watch
17 Jewels O.F.
16,750
Time King
17 Jewels O.F.
1,250
Serial numbers used on this page by the kind permission of
Russell W Snyder
Grade 127 movements found to date.
Grade 127 runs.
Last update 12/09/2015.
Grade 127,
17 jewels adjusted, manufactured from 1927 to 1932 a total of 22,400 movements in 23 runs make up this grade. Model 3 open face;  bridge movements
of medium quality,  double roller and patent micrometric regulator.

Observations,
The movements have mostly bright striped pattern demaskeening with the majority named Illinois Watch and Illinois Watch Co., other named movements  
make up the remainder. The grade looks to be a continuation of grade 405 that ended production in 1929.

Variants,
Early movements are named Illinois Watch Co. and have screwed set jewels on the balance cock. This changes in the 3rd run to Illinois Watch on the
movements and have press fitted jewels on the balance. The last 3 runs have 17 jewels marked on the center bridge.

Description,
17 jewels; oreide settings; adjusted to temperature; spring tempered compensating balance with timing screws; double roller escapement; hardened and
polished steel escape wheel; sapphire pallets; sapphire jewel pins; gold beveled and polished center wheel; Brequet hairspring; patent micrometric screw
regulator; safety screw center pinion; perfect self locking setting device; polished winding wheels; safety recoil click.
Images of variants