Pocket Watch Database

From the American Horology Archive:
Rockford Grade 66 Pocket Watch

Rockford Watch Co.

Grade: 66

Manufacturer: Rockford
Manufacturer Location: Rockford, Illinois
Movement Serial Number: 417460
Grade: 66
Model: 7
Estimated Production Year: 1893
Run Quantity: 500
Grade/Model Run: 13 of 17
Grade/Model Total Production: 14,700
Variant Est. Production: 14,000 (18S-M7-11J)
Size: 18s
Jewels: 11j
Jewel Setting: Screw-Set
Movement Configuration: Openface
Movement Finish: Nickel
Movement Inlay Color: Black
Movement Setting: Lever
Plate: Full Plate
Regulator: Plain
Hairspring: Flat
Escapement Type: Straight-line
Standard Dial Type: Single-Sunk
Adjusted: No
Railroad Grade: No
Movement Markings: R.W.Co.
Rockford Ill.
Data Research: 1907 Rockford Serial List
Case: Various
Registry Population: 4 (0.80%)
Database Version: v49.701

Production Metrics Tree: Grade 66

Target Profile: 18S-M7-11J-ONL-U

Rockford Grade 66 (All Variations): 14,700 ETP
18S: 14,700 100.00%
18s, Grade 66
18S-M7: 14,700 100.00%
18s, Grade 66, Model 7
18S-M7-11J: 14,000 95.24%
18s, Grade 66, Model 7, 11 Jewels
Other: 700
Other Jewels or Unclassified
18S-M7-11J-ONL: 14,000 95.24%
18s, Grade 66, Model 7, 11 Jewels, Openface/Lever/Nickel
18S-M7-11J-ONL-U: 14,000 95.24%

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 417025 #25 Marketplace February 12, 2013
2
Image Credit: MichaelB
417045 #45 Collection April 17, 2017
3 417398 #398 Marketplace October 12, 2014
4
Image Credit: Kosborne
417460 #460 Collection February 15, 2021
Standard Deviation of Known Examples: 229.03 (Expected: 144.48, Δ84.54/16.91%)

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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 · June 27, 2018

Serial Number 417258 was reported as accurate.

Just4orfun 117 · January 8, 2018

Serial Number 417258 was reported as accurate.

Anonymous · April 27, 2017

Serial Number 417249 was reported as accurate.

MichaelB 150 · April 17, 2017

Serial Number 417045 was reported as accurate.

Anonymous · December 25, 2014

Serial Number 417275 was reported as inaccurate.

No further details were submitted with the report.
Rockford Grade 66 Pocket Watch