Pocket Watch Database

From the American Horology Archive:
Rockford Grade 83 Pocket Watch Movement

Rockford Watch Co.

Grade: 83

Manufacturer: Rockford
Manufacturer Location: Rockford, Illinois
Movement Serial Number: 405531
Grade: 83
Model: 8
Estimated Production Year: 1892
Run Quantity: 500
Grade/Model Run: 23 of 32
Total Production: 21,100
Size: 18s
Jewels: 15j
Jewel Setting: Screw-Set
Movement Configuration: Hunting
Movement Finish: Nickel
Movement Inlay Color: Black
Movement Setting: Lever
Plate: Full Plate
Regulator: Micrometric
Hairspring: Breguet
Escapement Type: Straight-line
Adjusted: Mixed
Movement Markings: R.W.Co.
Rockford Ill.
Data Research: 1907 Rockford Serial List
Database Version: v47.171
Research Note: Rockford serial lists designate this run as Grade 83. However, #405531 has been verified as marked "17 J" and "Adjusted," inconsistent with other standard Grade 83 movements and is more consistent with the Grade 82 designation. Rockford offered the Grade 83 with an optional factory adjustment, described as the Grade "83x" in original advertisements.

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Data Verification Reports

Verification Serial Map

jskirk621 Supporter 11 ยท July 23, 2021

Serial Number 405531 was reported as inaccurate.

Note: This is marked 17J and Adjusted.
Curator Response: Thanks for the report. This information has been noted in the research notes for this run.
Rockford Grade 83 Pocket Watch Movement