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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1144619/link
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1144619/link
Access Date: March 08, 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:
-Series10-16s.jpg)
E. Howard Watch Co. (Keystone)
Grade: Series 10
| Manufacturer: | E. Howard Watch Co. (Keystone) |  |
| Manufacturer Location: | Waltham, Massachusetts | |
| Movement Serial Number: | 1144619 | |
| Grade: | Series 10 | |
| Model: | 1907 | |
| Estimated Production Year: | 1909 | |
| Run Quantity: | 500 | |
| Grade/Model Run: | 2 of 21 | |
| Grade/Model Total Production: | 17,800 | |
| Variant Est. Production: | 15,650 (16S-M1907-21J-ONL) | |
| Size: | 16s | |
| Jewels: | 21j | |
| Jewel Setting: | Burnished Jewels | |
| Movement Configuration: | Openface | |
| Movement Finish: | Nickel | |
| Finish Pattern: | Parallel | |
| Movement Inlay Color: | Black | |
| Movement Setting: | Lever | |
| Plate: | Bridge Plate | |
| Bridge Type: | Center | |
| Double Roller: | Yes | |
| Barrel: | Going | |
| Regulator: | Reed | |
| Hairspring: | Breguet | |
| Standard Dial Type: | Double-Sunk | |
| Adjusted: | Yes | |
| Adjusted to Position: | Yes | |
| Adjusted # of Positions: | 5 | |
| Adjusted to Temperature: | Yes | |
| Adjusted to Isochronism: | Yes | |
| Railroad Grade: | Yes | |
| Dial Feet Locations: | 10.7, 24.3, 48.9 | |
| Movement Markings: | E. Howard Watch Co. Boston U.S.A. 21 Jewels Series 10 [Star in Arrow] Pat'd. Extra Adjustment Five Positions Temperature |
|
| Case: | Various | |
| Run ID: | 243.G2.16S160.161907M58.O160.L41.21J26 | |
| Database Version: | v52.621 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 53.59 | |
| PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 188.45 | |
| Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 3.403% | |
| Registry Population: Scoped for This Run Only | 2 (0.40%) | |
| $ Estimated Value (12 Month Change): | 5.17% Analyzing 178 Sales | |
Production Metrics Tree: Grade Series 10
Target Profile: 16S-M1907-21J-ONL-A5PTI
| E. Howard Watch Co. (Keystone) Grade Series 10 (All Variations): 17,800 ETP | |
| 16S: 17,800 100.00% 16s, Grade Series 10 |
|
| 16S-M1907: 17,800 100.00% 16s, Grade Series 10, Model 1907 |
|
| 16S-M1907-21J: 17,800 100.00% 16s, Grade Series 10, Model 1907, 21 Jewels |
|
| 16S-M1907-21J-ONL: 15,650 87.92% 16s, Grade Series 10, Model 1907, 21 Jewels, Openface/Lever/Nickel |
Other: 2,150
Other Configs or Unclassified |
| 16S-M1907-21J-ONL-A5PTI: 15,650 87.92% | |
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 2 images.
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