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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/rockford/330588
Access Date: May 02, 2024
From the American Horology Archive:
Rockford Grade 87 Pocket Watch
Rockford Watch Co.

Grade: 87

Manufacturer: Rockford
Manufacturer Location: Rockford, Illinois
Movement Serial Number: 330588
Grade: 87
Variation: LP
Model: 7
Estimated Production Year: 1889
Run Quantity: 800
Grade/Model Run: 2 of 8
Grade/Model Total Production: 5,500
Size: 18s
Jewels: 15j
Jewel Setting: Screw-Set
Movement Configuration: Openface
Movement Finish: Two-Tone
Movement Setting: Lever
Plate: Full Plate
Regulator: Type 5
Hairspring: Breguet
Escapement Type: Straight-line
Standard Dial Type: Double-Sunk
Adjusted: Yes
Movement Markings: R.W.Co.
Rockford Ill.
Adjusted
Data Research: 1907 Rockford Serial List
Case: Various
Run ID: 309.87G2.18S307.187M29.O41.L172.15J123
Database Version: v52.246
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration		 16.56
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration		 169.25
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration		 0.857%
Registry Population: 9 (1.13%)
Research Note: Rockford Serial Lists designate this run as featuring "Nickel" plates. However, this is not consistent with the other Grade 87 runs listed as "Nick. & Gilt" (two-tone). Observations in this run have confirmed movements feature a two-tone finish, indicating an error in the factory lists.
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Production Metrics Tree: Grade 87

Target Profile: 18S-M7-15J-OTL-A-LP

Rockford Grade 87 (All Variations): 5,500 ETP
18S: 5,500 100.00%
18s, Grade 87
18S-M7: 5,500 100.00%
18s, Grade 87, Model 7
18S-M7-15J: 5,500 100.00%
18s, Grade 87, Model 7, 15 Jewels
18S-M7-15J-OTL: 5,500 100.00%
18s, Grade 87, Model 7, 15 Jewels, Openface/Lever/Two-Tone
18S-M7-15J-OTL-A: 5,500 100.00%
18S-M7-15J-OTL-A-LP: 5,500 100.00%

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
There are 9 watches in the population registry for this run with 1 image.
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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.

Anonymous · December 22, 2020

Serial Number 330235 was reported as accurate.

Bostonwatch 59 · September 6, 2020

Serial Number 330260 was reported as accurate.

Anonymous · February 25, 2020

Serial Number 330673 was reported as accurate.

Anonymous · March 17, 2019

Serial Number 330073 was reported as accurate.

Anonymous · January 26, 2019

Serial Number 330029 was reported as accurate.

Anonymous · September 25, 2017

Serial Number 330378 was reported as accurate.

Anonymous · December 20, 2016

Serial Number 330749 was reported as accurate.

Anonymous · December 14, 2016

Serial Number 330749 was reported as accurate.

Anonymous · August 20, 2016

Serial Number 330095 was reported as accurate.

Anonymous · March 26, 2016

Serial Number 330524 was reported as accurate.

Anonymous · March 23, 2016

Serial Number 330184 was reported as accurate.

tsullivan 18 · May 3, 2015

Serial Number 330523 was reported as accurate.

Changes since this report was submitted:
Movement Finish changed from Nickel to Two-Tone

tsullivan 18 · May 3, 2015

Serial Number 330523 was reported as accurate.

Changes since this report was submitted:
Movement Finish changed from Nickel to Two-Tone

tsullivan 18 · May 3, 2015

Serial Number 330523 was reported as accurate.

Changes since this report was submitted:
Movement Finish changed from Nickel to Two-Tone
Rockford Grade 87 Pocket Watch
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