Pocket Watch Database

From the American Horology Archive:
Rockford Grade 83 Pocket Watch

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
Grade/Model Total Production: 21,100
Variant Est. Production: 20,400 (18S-M8-15J-HNL)
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
Case: Various
Run ID: 434.83G23.18S370.188M93.H235.L297.15J179
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
63.17
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
649.40
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
3.286%
Registry Population: 4 (0.80%)
$ Estimated Value (12 Month Change): -6.25% Analyzing 104 Sales
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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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 21 · 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