Pocket Watch Database

From the American Horology Archive:
Rockford Grade 89 Pocket Watch

Rockford Watch Co.

Grade: 89

Manufacturer: Rockford
Manufacturer Location: Rockford, Illinois
Movement Serial Number: 436999
Grade: 89
Model: 7
Estimated Production Year: 1894
Run Quantity: 700
Grade/Model Run: 10 of 10
Grade/Model Total Production: 7,300
Size: 18s
Jewels: 15j
Jewel Setting: Screw-Set
Movement Configuration: Openface
Movement Finish: Gilt
Movement Inlay Color: None
Movement Setting: Lever
Plate: Full Plate
Regulator: Type 6
Hairspring: Breguet
Escapement Type: Straight-line
Standard Dial Type: Single-Sunk
Adjusted: Mixed
Movement Markings: R.W.Co.
Rockford Ill.
Data Research: 1907 Rockford Serial List
Case: Various
Run ID: 494.89G10.18S427.187M95.O107.L357.15J194
Database Version: v52.246
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
21.98
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
224.65
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
1.137%
Registry Population: 8 (1.14%)
Research Note: The last run of Grade 89 movements [436,301-437,000] is designated in Rockford Serial Lists as featuring 11 Jewels. However, this is inconsistent with other 15-Jewel runs and is noted as a continuation of the 11-Jewel count from the previous run, so this is considered to be an error in the factory lists.

#436999: Verified with fine nickel damaskeening and gold jewel settings, inconsistent with the Grade 89 designation reflected in the the Rockford factory serial lists.

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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.


ChrisG Top Contributor Supporter 544 · February 23, 2024

Serial Number 436999 was reported as inaccurate.

Note: Nickel plates - demaskeened - type 6 reg - jewel
count TBD - screw mount settings.

Anonymous · December 11, 2021

Serial Number 436714 was reported as accurate.

Anonymous · February 15, 2018

Serial Number 436391 was reported as inaccurate.

Note: Rockford 17 J Serial No . 436391 Has 17J on Works
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection so we can take a closer look.
Changes since this report was submitted:
Jewels changed from 11j to 15j

Anonymous · July 15, 2016

Serial Number 436865 was reported as accurate.

Changes since this report was submitted:
Jewels changed from 11j to 15j

Anonymous · June 15, 2015

Serial Number 436822 was reported as accurate.

Changes since this report was submitted:
Jewels changed from 11j to 15j

Anonymous · May 12, 2015

Serial Number 436742 was reported as accurate.

Changes since this report was submitted:
Jewels changed from 11j to 15j
Rockford Grade 89 Pocket Watch