Pocket Watch Database
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1077862/movement
Access Date: December 14, 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:
E. Howard Watch Co. (Keystone)
Grade: Series 5
Manufacturer: | E. Howard Watch Co. (Keystone) | |
Manufacturer Location: | Waltham, Massachusetts | |
Movement Serial Number: | 1077862 | |
Grade: | Series 5 | |
Variation: | Hooked Bridge Jeweled Barrel | |
Model: | 1907 | |
Estimated Production Year: | 1910 | |
Run Quantity: | 300 | |
Grade/Model Run: | 13 of 26 | |
Grade/Model Total Production: | 16,400 | |
Variant Est. Production: | 800 (16S-M1907-19J-HNP-A5PTI-HOOKED BRIDGE JEWELED BARREL) | |
Size: | 16s | |
Jewels: | 19j | |
Jewel Material: | Ruby & Sapphire | |
Movement Configuration: | Hunting | |
Movement Finish: | Nickel | |
Movement Setting: | Pendant | |
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: | No | |
Dial Feet Locations: | 10.7, 24.3, 48.9 | |
Movement Markings: | E. Howard Watch Co. Boston U.S.A. Adjusted 19 Jewels Pat'd. '08 Extra Adjustment Five Positions Temperature |
|
Case: | Various | |
Run ID: | 179.G14.16S124.161907M24.H56.P145.19J24 | |
Database Version: | v52.508 | |
Advanced Metrics | ||
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 5.42 | |
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 18.96 | |
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 0.344% | |
Registry Population: Scoped for This Run Only | 4 (1.33%) | |
Research Note: #1077848: Reported as 23-Jewel, Hunting, Pendant-Set (Consistent with Series 0)
|
Production Metrics Tree: Grade Series 5
Target Profile: 16S-M1907-19J-HNP-A5PTI-HOOKED BRIDGE JEWELED BARREL
E. Howard Watch Co. (Keystone) Grade Series 5 (All Variations): 16,800 ETP | |||
16S: 16,800 100.00% 16s, Grade Series 5 |
|||
16S-M1907: 16,400 97.62% 16s, Grade Series 5, Model 1907 |
Other: 400
Other Models or Unclassified |
||
16S-M1907-19J: 16,400 97.62% 16s, Grade Series 5, Model 1907, 19 Jewels |
|||
16S-M1907-19J-HNP: 1,800 10.71% 16s, Grade Series 5, Model 1907, 19 Jewels, Hunting/Pendant/Nickel |
Other: 14,600
Other Configs or Unclassified |
||
16S-M1907-19J-HNP-A5PTI: 1,800 10.71% | |||
16S-M1907-19J-HNP-A5PTI-HOOKED BRIDGE JEWELED BARREL: 800 4.76% | Other: 1,000
Other Variants or Unclassified |
Population Registry for This Run
Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
---|---|---|---|---|---|
There are 4 watches in the population registry for this run with 1 image.
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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 · April 5, 2019
Serial Number 1077848 was reported as inaccurate.
not marked series 0 it is adjusted 5 positions and
only seemed to be offered in solid 14k gold
hunters cases. Also it is a stem set. And there is
no arrow on the bridge. It is very similar to the
series 0
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