A Guide to Illinois Watch Co. size 12 Watches, Grade 409.
Run.
Date
From
To
Total
H/O
Jls
Adj.
Run.
Date
From
To
Total
H/O
Jls
Adj.
1
1913
2,530,751
2,530,900
150
O
21
5 Pos.
7
1915
2,832,001
2,832,100
100
O
21
5 Pos.
2
1913
2,580,401
2,580,600
200
H
21
5 Pos.
8
1915
2,850,101
2,850,200
100
H
21
5 Pos.
3
1913
2,589,701
2,589,750
50
O
21
5 Pos.
9
1915
2,864,001
2,864,200
200
O
21
5 Pos.
4
1913
2,589,801
2,590,000
200
O
21
5 Pos.
10
1916
2,948,471
2,940,500
30
O
21
5 Pos.
5
1914
2,596,301
2,596,350
50
H
21
5 Pos.
11
1916
2,966,001
2,966,200
200
O
21
5 Pos.
6
1915
2,820,801
2821,000
200
O
21
5 Pos.
12
1916
2,966,361
2,966,400
40
O
21
5 Pos.
           
 
 
  Total
1,520
 
Name
H/O
Estimate
Name
H/O
Estimate
Brodnax, Menphis Tenn.
21 Jewels O.F.
20
Illinois Watch Co.  
21 Jewels H.
150
Hennegen-Bates Baltimore MD.
21 Jewels O.F.
20
Illinois Watch Co. made for The Cowell & Hubbard Co,  
21 Jewels O.F.
70
Illinois
21 Jewels O.F.
165
Chas. F Sarbaugh Hanover Pa.
21 Jewels O.F.
50
Illinois
21 Jewels H.
200
L  W Sutter Seattle
21 Jewels O.F.
5
Illinois Watch Co.
21 Jewels O.F.
735
The Brenner Watch, Youngstown
21 Jewels O.F.
5
Serial numbers used on this page by the kind permission of  
Russell W Snyder
Grade 409 Movements found to date.
Grade 409 runs.
Last update 05/22/2020.

Grade 409,
21 diamond, ruby and sapphire jewels adjusted to 5 positions, manufactured from 1913 to 1916, a total of 1,520 movements in 12 runs make up this
grade. Model 3 open faced and model 4 hunter; bridge movements of very high quality, with double roller and patent micrometric regulator. Open faced
1,170 in 9 runs and Hunter 350 in 3 runs.  

Observations,
The movements have mostly broad striped patterned demaskeening, with the majority named Illinois and Illinois Watch Co., named and private labels in
various demaskeening make up the remainder. Early movements have a larger recessed gold plate holding escape wheel jewel and cap jewel, this
changes to a smaller recessed gold plate in later models. This grade is similar to grade A Lincoln from observations the upper escapement jewel on
grade 409 have a recessed gold plate setting, Grade A Lincoln have a raised gold setting held with 2 screws.

Variants,
An Estimate of 70 Illinois Watch Co. models were made for The Cowell & Hubbard Co. they have burnished set jewels on the bridges. Cowell & Hubbard
dials were fitted and not recessed into the pillar plate and may require a larger case. Similar watches for this company were made in grades 404, 405
and 406.

Description,
21 extra quality diamond, ruby ans sapphire jewels, raised gold settings; adjusted to temperature and five positions and isochronism; very carefully rated
and timed: Quality hardened and tempered compensating balance with gold screws including mean time screws; round arm gold train wheels: double
roller escapement; beveled and polished escape wheel; one piece polished and cornered pallet and fork; gold guard pin stake in fork; selected quality
red ruby pallet jewels oval top and bottom; ruby jewel pin; best quality Breguet hairspring; safety screw center pinion; entire escapement cap jeweled;
hand finished conical pivots; Illinoise superior mainspring; patent micrometric screw regulator; recoil click; concave and polished winding wheels, screws
are chamfered and slots are cornered; double sunk glass enameled dial; plates and bridges have chamfered edges are nicely finished and artistically
demaskeened; engraving inlaid with gold.
Image of Cowell and Hubbard movement.