Rcardkidz · September 29, 2021
Serial Number 933786 was reported as accurate.
Information Provided by PocketWatchDatabase.com:
https://new.pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/933541
https://new.pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/933541
Access Date: June 3, 2026
From the American Horology Archive:
E. Howard Watch Co. (Keystone)
Grade: Series 3
Due to the lack of existing factory records, our E. Howard Watch Co. (Keystone) database has been reconstructed using observations of known watches.
As a result, the information may contain inaccuracies. Please let us know if you have details that can improve the database.
As a result, the information may contain inaccuracies. Please let us know if you have details that can improve the database.
| Manufacturer: | E. Howard Watch Co. (Keystone) | ? |
| Manufacturer Location: | Waltham, Massachusetts | ? |
| Movement Serial Number: | 933541 | ? |
| Grade: | Series 3 | ? |
| Model: | 1905 | ? |
| Estimated Production Year: | 1906 | ? |
| Run Quantity: | 1,000 | ? |
| Grade/Model Run: | 6 of 39 | ? |
| Grade/Model Total Production: | 49,390 | ? |
| Variant Est. Production: | 22,550 (16S-M1905-O) | ? |
| Size: | 16s | ? |
| Jewels: | 17j | ? |
| Jewel Material: | Ruby & Sapphire | ? |
| Jewel Setting: | Gold Settings (Screw-Set) | ? |
| Movement Configuration: | Openface | ? |
| Movement Finish: | Nickel | ? |
| Finish Pattern: | Circular | ? |
| Movement Setting: | Pendant | ? |
| Plate: | 3/4 Plate | ? |
| Regulator: | Reed | ? |
| Hairspring: | Breguet | ? |
| Pallet Jewel Material: | Sapphire | ? |
| Standard Dial Type: | Single-Sunk | ? |
| Adjusted: | Yes | ? |
| Adjusted to Position: | Yes | ? |
| Adjusted # of Positions: | 3 | ? |
| Adjusted to Temperature: | Yes | ? |
| Adjusted to Isochronism: | Yes | ? |
| Dial Feet Locations: | 10.7, 24.3, 48.9 | ? |
| Movement Markings: | E. Howard Watch Co. Boston U.S.A. Adjusted 17 Jewels Pat'd. '05 | ? |
| Case: | Various | ? |
| Run ID: | 61.G25.16S36.161905M35.O36.P50.17J39 | ? |
| Database Version: | v52.978 | ? |
| Advanced Metrics | ||
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| Registry Population: Scoped for This Run Only: | 25 (2.50%) | ? |
| $ Estimated Value (12 Month Change): | +7.79% Analyzing 316 Sales | ? |
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Population Registry for This Run
Total Known Population In Run 25/1,000
Percentage of Total Run 2.50%
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There are 25 watches in the population registry for this run with 1 image.
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Verification Reports for this Run
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