Pocket Watch Database
Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/rockford/439889
https://pocketwatchdatabase.com/search/result/rockford/439889
Access Date: April 28, 2024
From the American Horology Archive:
Rockford Watch Co.
Grade: 61
| Manufacturer: | Rockford |  |
| Manufacturer Location: | Rockford, Illinois | |
| Movement Serial Number: | 439889 | |
| Grade: | 61 | |
| Model: | 7 | |
| Estimated Production Year: | 1894 | |
| Run Quantity: | 50 | |
| Grade/Model Run: | 2 of 2 | |
| Grade/Model Total Production: | 150 | |
| Variant Est. Production: | 50 (18S-M7-21J) | |
| Size: | 18s | |
| Jewels: | 21j | |
| Jewel Setting: | Screw-Set | |
| Movement Configuration: | Openface | |
| Movement Finish: | Two-Tone | |
| Movement Setting: | Lever | |
| Plate: | Full Plate | |
| Regulator: | Micrometric | |
| Hairspring: | Breguet | |
| Escapement Type: | Straight-line | |
| Adjusted: | Yes | |
| Adjusted to Position: | Yes | |
| Adjusted to Temperature: | Yes | |
| Adjusted to Isochronism: | Yes | |
| Movement Markings: | R.W.Co. Rockford, Ill. 21 Jewels Adjusted |
|
| Data Research: |
1907 Rockford Serial List |
|
| Case: | Various | |
| Run ID: | 507.61G2.18S440.187M100.O112.L370.21J2 | |
| Database Version: | v52.245 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 0.45 | |
| PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 4.59 | |
| Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 0.023% | |
| Registry Population: | 2 (4.00%) | |
|
Research Note: Rockford Serial Lists designate this run as Grade 61 with 17 Jewels. However, #439889 has been verified as marked "21 Jewels," and #439884 has been reported as marked "21 Jewels." This suggests all or some of the run was fitted with 21 Jewels instead of 17. Additionally, the verified movement has a two-tone finish instead of standard nickel.
By studying #439889, it is evident the company upgraded the barrel bridge that was originally marked "17 J" to read "21 Jewels." The jewel count does appear to be true to the movement due to the (likely) cap-jeweled pallet fork. |
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Production Metrics Tree: Grade 61
Target Profile: 18S-M7-21J-OTL-APTI
| Rockford Grade 61 (All Variations): 150 ETP | |
| 18S: 150 100.00% 18s, Grade 61 |
|
| 18S-M7: 150 100.00% 18s, Grade 61, Model 7 |
|
| 18S-M7-21J: 50 33.33% 18s, Grade 61, Model 7, 21 Jewels |
Other: 100
Other Jewels or Unclassified |
| 18S-M7-21J-OTL: 50 33.33% 18s, Grade 61, Model 7, 21 Jewels, Openface/Lever/Two-Tone |
|
| 18S-M7-21J-OTL-APTI: 50 33.33% | |
Population Registry for This Run
| Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
|---|---|---|---|---|---|
|
There are 2 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.
NumbatNinja Supporter 48 · May 4, 2023
Serial Number 439889 was reported as inaccurate.
Note: #439889 is 21 Jewels and Two-Tone. My example is
incomplete but I have uploaded a photo.
incomplete but I have uploaded a photo.
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Changes since this report was submitted:
Movement Finish changed from Nickel to Two-Tone
Jewels changed from 17j to 21j
Anonymous · July 27, 2020
Serial Number 439884 was reported as inaccurate.
Note: Mine is 21 jewels, not 17.
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Changes since this report was submitted:
Jewels changed from 17j to 21j
Movement Finish changed from Nickel to Two-Tone
