Illinois Pocket Watch: Serial Number 4720872 (Grade Sangamo Special)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/illinois/4720872

Access Date: November 15, 2024

From the American Horology Archive:

Illinois Watch Co.

Grade: Sangamo Special

Manufacturer:	Illinois
Manufacturer Location:	Springfield, Illinois
Movement Serial Number:	4720872
Grade:	Sangamo Special
Variation:	60HR
Model:	13
Estimated Production Year:	1926
Run Quantity:	1,000
Grade/Model Run:	8 of 13
Grade/Model Total Production:	11,200
Variant Est. Production:	3,200 (17S-M13-23J-ONL-A6PTI-60HR)
Size:	17s
Jewels:	23j
Jewel Material:	Ruby & Sapphire
Jewel Setting:	Raised Gold Settings (Screw-Set)
Movement Configuration:	Openface
Movement Finish:	Nickel
Movement Setting:	Lever
Plate:	Bridge Plate
Bridge Type:	False Center
Double Roller:	Yes
Barrel:	60-Hr. Motor
Train Material:	Gold
Center Wheel Material:	Gold
Hairspring:	Breguet
Pallet Jewel Material:	Ruby
Adjusted:	Yes
Adjusted to Position:	Yes
Adjusted # of Positions:	6
Adjusted to Temperature:	Yes
Adjusted to Isochronism:	Yes
Railroad Grade:	Yes
Dial Feet Locations:	17.5, 39.0, 58.0
Case Screw Locations:	3.0, 38.0
Case:	Various
Run ID:	11986.G50.17S12.1713M8.O6730.L6984.23J267
Database Version:	v52.433
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	33.72
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	113.72
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	0.197%
Registry Population: Scoped for This Run Only	39 (3.90%)
$ Estimated Value (12 Month Change):	-10.46% Analyzing 171 Sales

Value Guide

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Production Metrics Tree: Grade Sangamo Special

Target Profile: 17S-M13-23J-ONL-A6PTI-60HR

Illinois Grade Sangamo Special (All Variations): 30,260 ETP
17S: 17,600 58.16% 17s, Grade Sangamo Special			Other: 12,660 Other Sizes or Unclassified
17S-M13: 11,200 37.01% 17s, Grade Sangamo Special, Model 13		Other: 6,400 Other Models or Unclassified
17S-M13-23J: 11,200 37.01% 17s, Grade Sangamo Special, Model 13, 23 Jewels
17S-M13-23J-ONL: 11,200 37.01% 17s, Grade Sangamo Special, Model 13, 23 Jewels, Openface/Lever/Nickel
17S-M13-23J-ONL-A6PTI: 11,200 37.01%
17S-M13-23J-ONL-A6PTI-60HR: 3,200 10.58%	Other: 8,000 Other Variants or Unclassified

Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
There are 39 watches in the population registry for this run with 9 images. Create a FREE account or login to view the population registry and add your watch to the registry. Create a Free Account

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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.

cjbrem Supporter 910 · September 9, 2024

Serial Number 4720690 was reported as accurate.

Anonymous · July 9, 2024

Serial Number 4720220 was reported as accurate.

Anonymous · June 8, 2024

Serial Number 4720454 was reported as accurate.

Anonymous · October 31, 2022

Serial Number 4720997 was reported as accurate.

Anonymous · April 11, 2022

Serial Number 4720433 was reported as inaccurate.

Note: 4720433. Under the Grade: Sagamo Special, should
be "Unmarked 60-Hour". The listing neglects that
the detail: Barrel - 60 Hr. Motor. A real world
test recently conducted on this watch demonstrated
that it ran for 58 hours and 23 minutes - not bad
for a 96 year old watch. From The Sangamo Special
- Beginning to End by Michael Chameleon
11-23-2006, it is stated that “(The Model 13’s
were all 60 Hour watches, however only the last
2200 were marked Sixty Hour)”. As I am planning
to sell the watch, the omission of these details
can have a huge impact on its value. It would be
greatly appreciated if the information be updated.
I thank-you in advance.

Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.