Illinois Pocket Watch: Serial Number 3591621 (Grade 89)

Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/illinois/3591621

Access Date: May 29, 2023

From the American Horology Archive:

Illinois Watch Co.

Grade: 89

Manufacturer:	Illinois
Manufacturer Location:	Springfield, Illinois
Movement Serial Number:	3591621
Grade:	89
Model:	6
Estimated Production Year:	1919
Run Quantity:	1,000
Grade/Model Total Production:	39,210
Size:	18s
Jewels:	17j
Movement Configuration:	Openface
Movement Finish:	Two-Tone
Movement Setting:	Lever
Plate:	Full Plate
Barrel:	Going
Train:	Fast
Adjusted:	Yes
Adjusted # of Positions:	3
Adjusted to Temperature:	Yes
Railroad Grade:	No
Dial Feet Locations:	2.0, 21.5, 38.5
Case Screw Locations:	23.5, 51.5
Case:	Various
Database Version:	v50.828
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	112.79
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	394.31
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	0.683%
Registry Population:	7 (0.70%)
Research Note: Movement #3591860 verified as a 16-Size Grade 306 instead of the 18-Size Grade 89 that corresponds to this run. However, the pillar plate was confirmed to be marked #3601860, matching a run of Grade 306 and indicating a factory error marking the top plate with #3591860.

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Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
1		3591075	#75	Marketplace	June 08, 2014
2		3591479	#479	Collection	August 27, 2014
3		3591537	#537	Marketplace	June 16, 2022
4	Image Credit: okiejohn	3591621	#621	Collection	October 04, 2019
5		3591726	#726	Inferred
6		3591799	#799	Marketplace	July 21, 2014
7	Image Credit: Mlof73	3591860	#860	Collection	October 09, 2020
Standard Deviation of Known Examples: 263.39 (Expected: 288.82, Δ25.43/2.54%)

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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.

Mlof73 Supporter 5 · October 10, 2020

Serial Number 3591860 was reported as inaccurate.

Note: Size is 16s NOT 18s.
Mvmt meas = 43mm

Anonymous · August 7, 2020

Serial Number 3591860 was reported as accurate.

okiejohn 310 · October 24, 2019

Serial Number 3591621 was reported as inaccurate.

Note: Wouldn't this movement be classified as
"two-toned" with the nickel background and
gold/nickel checkerboard pattern in the middle?
(see photos) Otherwise everything seems to be
correct.

Curator Response: Thanks for the report. Yes, indeed. This run has been updated to include the two-tone finish.

Changes since this report was submitted: