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Auction image
1888 Rockford Grade 83 M-8 15j 18s Pocket Watch Century Swing out Works w/Chain
$249.95
Check Price Source: eBay.com
Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/rockford/405531
Access Date: May 29, 2025
From the American Horology Archive:
Rockford Grade 83 Pocket Watch
Rockford Watch Co.

Grade: 83

Manufacturer: Rockford Question Mark
Manufacturer Location: Rockford, Illinois Question Mark
Movement Serial Number: 405531 Question Mark
Grade: 83 Question Mark
Model: 8 Question Mark
Estimated Production Year: 1892 Question Mark
Run Quantity: 500 Question Mark
Grade/Model Run: 23 of 32 Question Mark
Grade/Model Total Production: 21,100 Question Mark
Variant Est. Production: 20,400 (18S-M8-15J-HNL) Question Mark
Size: 18s Question Mark
Jewels: 15j Question Mark
Jewel Setting: Screw-Set Question Mark
Movement Configuration: Hunting Question Mark
Movement Finish: Nickel Question Mark
Movement Inlay Color: Black Question Mark
Movement Setting: Lever Question Mark
Plate: Full Plate Question Mark
Regulator: Micrometric Question Mark
Hairspring: Breguet Question Mark
Escapement Type: Straight-line Question Mark
Adjusted: Mixed Question Mark
Movement Markings: R.W.Co.
Rockford Ill.
Case: Various Question Mark
Run ID: 434.83G23.18S370.188M93.H237.L297.15J179 Question Mark
Data Research: 1907 Rockford Serial List
 Question Mark
Database Version: v52.670 Question Mark
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Registry Population:
Scoped for This Run Only		5 (1.00%) Question Mark
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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Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
There are 5 watches in the population registry for this run with 2 images.
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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.

jskirk621 Supporter 25 · 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