Pocket Watch Database
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/952897/link
Access Date: June 05, 2025
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.
From the American Horology Archive:
-Series4-16s.jpg)
E. Howard Watch Co. (Keystone)
Grade: Series 4
| Manufacturer: | E. Howard Watch Co. (Keystone) |
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| Manufacturer Location: | Waltham, Massachusetts |
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| Movement Serial Number: | 952897 |
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| Grade: | Series 4 |
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| Model: | 1905 |
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| Estimated Production Year: | 1907 |
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| Run Quantity: | 1,000 |
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| Grade/Model Run: | 8 of 25 |
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| Grade/Model Total Production: | 16,350 |
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| Variant Est. Production: | 4,130 (16S-M1905-17J-HNP) |
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| Size: | 16s |
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| Jewels: | 17j |
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| Jewel Material: | Ruby & Sapphire |
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| Jewel Setting: | Gold Settings (Screw-Set) |
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| Movement Configuration: | Hunting |
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| Movement Finish: | Nickel |
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| Finish Pattern: | Checkerboard |
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| Movement Setting: | Pendant |
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| Plate: | 3/4 Plate |
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| Double Roller: | Yes |
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| Regulator: | Reed |
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| Hairspring: | Breguet |
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| Pallet Jewel Material: | Sapphire |
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| Standard Dial Type: | Double-Sunk |
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| Adjusted: | Yes |
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| Adjusted to Position: | Yes |
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| Adjusted # of Positions: | 5 |
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| Adjusted to Temperature: | Yes |
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| Adjusted to Isochronism: | Yes |
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| Railroad Grade: | Yes |
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| U.S. Patents: | 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667 |
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| Dial Feet Locations: | 10.7, 24.3, 48.9 |
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| Movement Markings: |
E. Howard Watch Co. Boston U.S.A. Adjusted 17 Jewels Pat'd. '05 |
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| Case: | Various | |
| Run ID: | 82.G8.16S57.161905M56.H25.P72.17J60 | |
| Database Version: | v52.693 | |
| Advanced Metrics | ||
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| Registry Population: Scoped for This Run Only | 25 (2.50%) | |
| $ Estimated Value (12 Month Change): | -1.69% Analyzing 78 Sales | |
Population Registry for This Run
| Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
|---|---|---|---|---|---|
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There are 25 watches in the population registry for this run with 2 images.
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Help Us Help Others By Improving the Database:
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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 · September 21, 2021
Serial Number 952899 was reported as accurate.
Anonymous · September 9, 2020
Serial Number 952092 was reported as inaccurate.
Arabic numeral dial.
Anonymous · August 17, 2020
Serial Number 952676 was reported as accurate.
arvidsverige 15 · December 9, 2019
Serial Number 952676 was reported as accurate.
postie974 3 · May 8, 2019
Serial Number 952897 was reported as accurate.
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