Pocket Watch Database

From the American Horology Archive:
Illinois Grade Bunn Special Pocket Watch

Illinois Watch Co.

Grade: Bunn Special

Manufacturer: Illinois
Manufacturer Location: Springfield, Illinois
Movement Serial Number: 4109398
Grade: Bunn Special
Variation: PennSpec
Model: 11
Estimated Production Year: 1922
Run Quantity: 20
Grade/Model Run: 24 of 29
Grade/Model Total Production: 13,270
Variant Est. Production: 20 (16S-M11-23J-ONL-A6PTI-PENNSPEC)
Size: 16s
Jewels: 23j
Jewel Material: Ruby
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Plate: 3/4 Plate
Double Roller: Yes
Barrel: 48-Hr. Motor
Regulator: Reed
Hairspring: Breguet
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: 11464.G478.16S3675.1611M49.O6222.L6810.23J243
Research References: American Pocket Watches: Illinois Watch Co.: Volume 2. (William Meggers & Roy Ehrhardt)
The 16 Size Illinois Bunn Special, 1913-1948. (Michael Chamelin)
Database Version: v52.304
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
39.95
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
137.41
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
0.233%
Registry Population: 1 (5.00%)
$ Estimated Value (12 Month Change): 7.51% Analyzing 301 Sales
Research Note: #4109381: Pennsylvania Special [Chamelin]. #4109398: Verified as "Pennsylvania Special" [eBay].

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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.


billreid 141 · January 29, 2024

Serial Number 4109398 was reported as inaccurate.

Note: Mostly accurate but... Dial & movement marked
Pennsylvania Special & movement is 2-tone.
Currently up for bid:
https://www.ebay.com/itm/126296561471

Anonymous · December 5, 2017

Serial Number 4109391 was reported as inaccurate.

Note: Plate layout seems the same, but marked
"Pennsylvania Special" on movement and dial.
Illinois Grade Bunn Special Pocket Watch