Pocket Watch Database
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1056850
Access Date: April 23, 2024
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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E. Howard Watch Co. (Keystone)
Grade: Series 5
| Manufacturer: | E. Howard Watch Co. (Keystone) |  |
| Manufacturer Location: | Waltham, Massachusetts | |
| Movement Serial Number: | 1056850 | |
| Grade: | Series 5 | |
| Variation: | Straight Bridge Jeweled Barrel | |
| Model: | 1907 | |
| Estimated Production Year: | 1911 | |
| Run Quantity: | 1,000 | |
| Grade/Model Run: | 10 of 27 | |
| Grade/Model Total Production: | 16,600 | |
| Variant Est. Production: | 4,100 (16S-M1907-19J-ONL-A5PTI-STRAIGHT BRIDGE JEWELED BARREL) | |
| Size: | 16s | |
| Jewels: | 19j | |
| Jewel Material: | Ruby & Sapphire | |
| Movement Configuration: | Openface | |
| Movement Finish: | Nickel | |
| Movement Setting: | Lever | |
| Plate: | Bridge Plate | |
| Bridge Type: | Center | |
| Double Roller: | Yes | |
| Barrel: | Jeweled Safety | |
| Regulator: | Reed | |
| Hairspring: | Breguet | |
| Pallet Jewel Material: | Sapphire | |
| 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 | |
| Case: | Various | |
| Run ID: | 150.G10.16S109.161907M20.O83.L11.19J17 | |
| Database Version: | v52.243 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 45.76 | |
| PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 152.05 | |
| Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 2.942% | |
| $ Estimated Value (12 Month Change): | -7.74% Analyzing 88 Sales | |
|
Research Note: No Series Markings
|
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Production Metrics Tree: Grade Series 5
Target Profile: 16S-M1907-19J-ONL-A5PTI-STRAIGHT BRIDGE JEWELED BARREL
| E. Howard Watch Co. (Keystone) Grade Series 5 (All Variations): 16,600 ETP | |||
| 16S: 16,600 100.00% 16s, Grade Series 5 |
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| 16S-M1907: 16,600 100.00% 16s, Grade Series 5, Model 1907 |
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| 16S-M1907-19J: 16,600 100.00% 16s, Grade Series 5, Model 1907, 19 Jewels |
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| 16S-M1907-19J-ONL: 15,100 90.96% 16s, Grade Series 5, Model 1907, 19 Jewels, Openface/Lever/Nickel |
Other: 1,500
Other Configs or Unclassified |
||
| 16S-M1907-19J-ONL-A5PTI: 15,100 90.96% | |||
| 16S-M1907-19J-ONL-A5PTI-STRAIGHT BRIDGE JEWELED BARREL: 4,100 24.70% | |||
Help Us Help Others By Improving the Database:
Does this information describe your movement accurately?
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 · August 8, 2023
Serial Number 1056931 was reported as accurate.
Anonymous · December 14, 2022
Serial Number 1056678 was reported as accurate.
Anonymous · March 18, 2021
Serial Number 1056558 was reported as accurate.
Anonymous · July 5, 2020
Serial Number 1056585 was reported as accurate.
bunnofnickle 67 · July 3, 2020
Serial Number 1056585 was reported as accurate.
Anonymous · March 8, 2020
Serial Number 1056509 was reported as accurate.
Anonymous · July 22, 2019
Serial Number 1056644 was reported as inaccurate.
Anonymous · January 27, 2019
Serial Number 1056562 was reported as accurate.
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