A Guide to Illinois Watch Co. size 12 watches, Grade 527.
Run.
Date
From
To
Total
H/O
Jls
Adj.
Run.
Date
From
To
Total
H/O
Jls
Adj.
1
1922
4,018,501
4,019,000
500
O
19
5 Pos.
13
1926
4,733,001
4,733,600
600
O
19
5 Pos.
2
1922
4,122,001
4,123,000
1,000
O
19
5 Pos.
14
1926
4,773,601
4,774,000
400
O
19
5 Pos.
3
1923
4,269,001
4,270,000
1,000
O
19
5 Pos.
15
1926
4,814,001
4,815,000
1,000
O
19
5 Pos.
4
1923
4,422,001
4,423,000
1,000
O
19
5 Pos.
16
1926
4,841,001
4,842,000
1,000
O
19
5 Pos.
5
1923
4,450,001
4,450,100
100
O
19
5 Pos.
17
1927
4,871,001
4,872,000
1,000
O
19
5 Pos.
6
1923
4,450,101
4,451,000
900
O
19
5 Pos.
18
1927
4,882,001
4,882,800
800
O
19
5 Pos.
7
1925
4,675,001
4,675,600
600
O
19
5 Pos.
19
1927
4,882,801
4,883,000
200
O
19
5 Pos.
8
1925
4,675,601
4,676,000
400
O
19
5 Pos.
20
1927
4,891,001
4,892,000
1,000
O
19
5 Pos.
9
1925
4,619,001
4,620,000
1,000
O
19
5 Pos.
21
1927
4,923,001
4,924,000
1,000
O
19
5 Pos.
10
1925
4,677,001
4,678,000
1,000
O
19
5 Pos.
22
1927
4,958,001
4,959,000
1,000
O
19
5 Pos.
11
1926
4,725,001
4,726,000
1,000
O
19
5 Pos.
23
1927
4,987,001
4,988,000
1,000
O
19
5 Pos.
12
1926
4,738,001
4,739,000
1,000
O
19
5 Pos.
  Total
18,500
 
Serial numbers used on this page by the kind permission of
Russell W Snyder
Grade 527 runs.
Last update 02/19/2015.
Grade 527,
19 ruby and sapphire jewels adjusted to 5 positions, manufactured from 1922 to 1927 a total of 18,500 movements in 23 runs make up this grade. Model
3XT open faced; 3/4 plate movements of high quality with Illinois superior motor barrel, double roller and patent regulator.

Observations,
The movements are bright lined pattern named A. Lincoln. Early models have burnished set jewels, this later changed to screw set jewels. Also a pallet
cock was fitted to early models this changed to a pallet bridge. Silver snap on bezel dials of various designs were fitted and a variety of gold and gold
filled named cases were advertised, Acorn; Oxford; Cambridge; Eton; Pioneer; Barrister; Trustee; and Dean made by Keystone; Fahys; Wadsworth and
Solidarity. The watches were factory cased.

Description,
19 ruby and sapphire jewels of extra quality; adjusted to 5 positions, temperature and isochronism; beveled arm gold center wheel; Breguet hairspring;
patent regulator; concave and polished winding wheels; recoil safety click; hardened spring tempered compensating balance; and Illinois motor barrel.

Images,
Grade 527 images are stored on Flickr, press the back arrow to return to this page.