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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/rockford/437860
Access Date: May 04, 2024
From the American Horology Archive:
Rockford Grade 81 Pocket Watch
Rockford Watch Co.

Grade: 81

Mixed Run: 17-Jewel and 21-Jewel Movements

Manufacturer: Rockford
Manufacturer Location: Rockford, Illinois
Movement Serial Number: 437860
Grade: 81
Variation: Mixed
Model: 8
Estimated Production Year: 1894
Run Quantity: 200
Grade/Model Run: 3 of 5
Grade/Model Total Production: 600
Variant Est. Production: 200 (18S-M8-17J-HTL-APTI-MIXED)
Size: 18s
Jewels: 17j    Mixed Run
Jewel Setting: Screw-Set
Movement Configuration: Hunting
Movement Finish: Two-Tone
Movement Setting: Lever
Plate: Full Plate
Regulator: Micrometric
Escapement Type: Straight-line
Standard Dial Type: Double-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Movement Markings: RW.Co.
Rockford, Ill.
17 J [or 21 Jewels]
Adjusted
Data Research: 1907 Rockford Serial List
Case: Various
Run ID: 496.81G4.18S429.188M128.H273.L359.17J23
Database Version: v52.246
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration		 1.80
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration		 18.44
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration		 0.093%
Registry Population: 5 (2.50%)
Research Note: Rockford Serial Lists designate this run as Grade 81 with 17 Jewels and "Plain" finish. However, #437811 and #437853 have been verified as marked "21 Jewels" with a two-tone finish. #437822 and #437848 have been reported as 21 Jewels. #437963 has been verified as marked "17 J." #245153 (also within a run listed as Grade 81) has been verified as a Model 3 with 9 Jewels and Gilt finish.
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Production Metrics Tree: Grade 81

Target Profile: 18S-M8-17J-HTL-APTI-MIXED

Rockford Grade 81 (All Variations): 1,600 ETP
18S: 1,600 100.00%
18s, Grade 81
18S-M8: 600 37.50%
18s, Grade 81, Model 8		 Other: 1,000
Other Models or Unclassified
18S-M8-17J: 600 37.50%
18s, Grade 81, Model 8, 17 Jewels
18S-M8-17J-HTL: 550 34.38%
18s, Grade 81, Model 8, 17 Jewels, Hunting/Lever/Two-Tone 		Other: 50
Other Configs or Unclassified
18S-M8-17J-HTL-APTI: 550 34.38%
18S-M8-17J-HTL-APTI-MIXED: 200 12.50%

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.

Rockfordguy Supporter 19 · October 23, 2023

Serial Number 437827 was reported as inaccurate.

Note: Private label marked 21 Jewels Adjusted

Anonymous · January 13, 2023

Serial Number 437804 was reported as inaccurate.

Note: This one is 21 jewels two-tone movement, marked on
movement and dial Otto Wettstein.
Rochelle, ill. 21 jewels adjusted.
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.

Anonymous · June 29, 2022

Serial Number 437822 was reported as accurate.

Anonymous · June 14, 2018

Serial Number 437983 was reported as accurate.

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

Anonymous · June 12, 2018

Serial Number 437983 was reported as accurate.

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

Anonymous · April 9, 2017

Serial Number 437822 was reported as inaccurate.

Note: Movement is stamped 21 jewels, not 17 jewels
Movement is nickel 2 tone not gilt.
Thank you.
Curator Response: Thanks for submitting this information. Please upload a photo to your collection so we can take a closer look.
Changes since this report was submitted:
Movement Finish changed from Gilt to Two-Tone

brinny 14 · March 4, 2017

Serial Number 437848 was reported as inaccurate.

Note: this watch is 21 jewels and 2 tone movement
Changes since this report was submitted:
Movement Finish changed from Gilt to Two-Tone
Rockford Grade 81 Pocket Watch