Pocket Watch Database

From the American Horology Archive:
Illinois Grade 186 Pocket Watch

Illinois Watch Co.

Grade: 186

Ruby Jewels

Manufacturer: Illinois
Manufacturer Location: Springfield, Illinois
Movement Serial Number: 1677553
Grade: 186
Model: 4
Estimated Production Year: 1903
Run Quantity: 500
Grade/Model Run: 14 of 21
Grade/Model Total Production: 2,930
Size: 16s
Jewels: 17j
Jewel Material: Ruby
Jewel Setting: Screw-Set
Movement Configuration: Hunting
Movement Finish: Nickel
Movement Inlay Color: Gilt
Movement Setting: Lever
Plate: 3/4 Bridge Plate
Bridge Type: 3-Finger
Barrel: Going
Center Wheel Material: Gold
Regulator: Micrometric
Hairspring: Breguet
Standard Dial Type: Double-Sunk
Adjusted: Yes
Adjusted # of Positions: 4
Adjusted to Temperature: Yes
Railroad Grade: Yes
Dial Feet Locations: 24.5, 36.5, 55.5
Case Screw Locations: 18.5, 52.5
Case: Various
Run ID: 4919.186G26.16S1041.164M497.H2577.L4055.17J1017
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
8.77
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
29.67
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
0.052%
Registry Population: 13 (2.60%)

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Verification Reports for this Run

The following reports have been graciously submitted by dedicated members in reference to this production run. These reports are useful to verify data and track inaccuracies that require further research. Please note that reports may contain inaccurate information or assumptions that must be dilligently considered with other available sources.


Bigbobhoss Supporter 45 · September 18, 2021

Serial Number 1677844 was reported as accurate.

georged 160 · December 15, 2020

Serial Number 1677578 was reported as accurate.

Changes since this report was submitted:
Plate changed from Bridge to 3/4 Bridge

Anonymous · September 12, 2017

Serial Number 1677553 was reported as accurate.

Changes since this report was submitted:
Plate changed from Bridge to 3/4 Bridge

Anonymous · March 22, 2017

Serial Number 1677552 was reported as accurate.

Changes since this report was submitted:
Plate changed from Bridge to 3/4 Bridge

oilseed Supporter 469 · February 27, 2017

Serial Number 1677671 was reported as inaccurate.

Note: According to 'Roy & Bills' Book (Amr Pocket
Watches, Vol 2), The model 4 (17J & 23J) was NOT
RR grade . Only the model 5 (17 & 23J) was RR
grade. you can tell the difference between model
4 and model 5 by the 'setting lever' position.
Model 4, lever position was 23min. Model 5 lever
position was 7.5min
the Model 4 was HUNTING and the Model 5 was OPEN
FACE.

The 'ea' drawing you show is also not correct.
it should show the 3 finger bridge type 'only'.
ea462 (model 4) and ea464 (model 5).
the ea drawing you are showing is ea463 which is
for the earlier Grades 171 through 177.
Curator Response: Thanks for the report. Since this range was manufacturered c.1903, it would still meet the requirements for service on most of the American railroads at the time, and thus, would be considered railroad grade until roughly 1906-1908. The factory diagram has been updated to display the bridge model.
Changes since this report was submitted:
Plate changed from 3/4 to 3/4 Bridge

Anonymous · January 24, 2016

Serial Number 1677900 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to 3/4 Bridge
Illinois Grade 186 Pocket Watch