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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/870264
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/870264
Access Date: February 03, 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:
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-Series3-16s.jpg)
E. Howard Watch Co. (Keystone)
Grade: Series 3
| Manufacturer: | E. Howard Watch Co. (Keystone) |  |
| Manufacturer Location: | Waltham, Massachusetts | |
| Movement Serial Number: | 870264 | |
| Grade: | Series 3 | |
| Model: | 1905 | |
| Estimated Production Year: | 1906 | |
| Run Quantity: | 350 | |
| Grade/Model Run: | 9 of 39 | |
| Grade/Model Total Production: | 49,390 | |
| Variant Est. Production: | 22,550 (16S-M1905-17J-ONP) | |
| Size: | 16s | |
| Jewels: | 17j | |
| Jewel Material: | Ruby & Sapphire | |
| Jewel Setting: | Gold Settings (Screw-Set) | |
| Movement Configuration: | Openface | |
| Movement Finish: | Nickel | |
| Finish Pattern: | Rayed | |
| Movement Setting: | Pendant | |
| Plate: | 3/4 Plate | |
| Regulator: | Reed | |
| Hairspring: | Breguet | |
| Pallet Jewel Material: | Sapphire | |
| Standard Dial Type: | Double-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 | |
| U.S. Patents: | 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667 | |
| Movement Markings: | E. Howard Watch Co. Boston U.S.A. Adjusted 17 Jewels |
|
| Case: | Various | |
| Run ID: | 34.G9.16S15.161905M14.O24.P31.17J19 | |
| Database Version: | v52.591 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 67.89 | |
| PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 238.77 | |
| Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 4.312% | |
| Registry Population: Scoped for This Run Only | 5 (1.43%) | |
|
Research Note: #870189: Reported as 7-Jewel Movement Marked "Climax - U.S.A."
|
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Production Metrics Tree: Grade Series 3
Target Profile: 16S-M1905-17J-ONP-A3PTI
| E. Howard Watch Co. (Keystone) Grade Series 3 (All Variations): 49,390 ETP | |
| 16S: 49,390 100.00% 16s, Grade Series 3 |
|
| 16S-M1905: 49,390 100.00% 16s, Grade Series 3, Model 1905 |
|
| 16S-M1905-17J: 49,390 100.00% 16s, Grade Series 3, Model 1905, 17 Jewels |
|
| 16S-M1905-17J-ONP: 22,550 45.66% 16s, Grade Series 3, Model 1905, 17 Jewels, Openface/Pendant/Nickel |
Other: 26,840
Other Configs or Unclassified |
| 16S-M1905-17J-ONP-A3PTI: 22,550 45.66% | |
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 1 image.
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