Pocket Watch Database
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1143508/movement
Access Date: November 28, 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: | 1143508 | |
Grade: | Series 5 | |
Variation: | Hooked Bridge Going Barrel | |
Model: | 1907 | |
Estimated Production Year: | 1909 | |
Run Quantity: | 1,000 | |
Grade/Model Run: | 25 of 26 | |
Grade/Model Total Production: | 16,400 | |
Variant Est. Production: | 1,200 (16S-M1907-19J-ONL-A5PTI-HOOKED BRIDGE GOING BARREL) | |
Size: | 16s | |
Jewels: | 19j | |
Jewel Material: | Ruby & Sapphire | |
Jewel Setting: | Burnished Jewels | |
Movement Configuration: | Openface | |
Movement Finish: | Nickel | |
Movement Setting: | Lever | |
Plate: | Bridge Plate | |
Bridge Type: | Center | |
Double Roller: | Yes | |
Barrel: | Going | |
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 | |
Movement Markings: | E. Howard Watch Co. Boston U.S.A. Series 5 19 Jewels [Triangle in Arrow] Pat'd. Extra Adjustment Five Positions Temperature |
|
Case: | Various | |
Run ID: | 238.G26.16S159.161907M57.O156.L40.19J39 | |
Database Version: | v52.467 | |
Advanced Metrics | ||
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 43.95 | |
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 154.56 | |
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 2.794% | |
Registry Population: Scoped for This Run Only | 5 (0.50%) | |
$ Estimated Value (12 Month Change): | -1.15% Analyzing 96 Sales | |
Research Note: #1143517: Verified with Jeweled Safety Barrel
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Production Metrics Tree: Grade Series 5
Target Profile: 16S-M1907-19J-ONL-A5PTI-HOOKED BRIDGE GOING BARREL
E. Howard Watch Co. (Keystone) Grade Series 5 (All Variations): 16,800 ETP | |||
16S: 16,800 100.00% 16s, Grade Series 5 |
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16S-M1907: 16,400 97.62% 16s, Grade Series 5, Model 1907 |
Other: 400
Other Models or Unclassified |
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16S-M1907-19J: 16,400 97.62% 16s, Grade Series 5, Model 1907, 19 Jewels |
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16S-M1907-19J-ONL: 14,000 83.33% 16s, Grade Series 5, Model 1907, 19 Jewels, Openface/Lever/Nickel |
Other: 2,400
Other Configs or Unclassified |
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16S-M1907-19J-ONL-A5PTI: 14,000 83.33% | |||
16S-M1907-19J-ONL-A5PTI-HOOKED BRIDGE GOING BARREL: 1,200 7.14% | Other: 12,800
Other Variants or Unclassified |
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 2 images.
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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.
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From This Run
Image Source/Credit: Jones & Horan Auctions
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From This Run
uploaded by MadBunny
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uploaded by oldbill
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uploaded by ChrisG
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uploaded by winterwolf
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uploaded by MichaelB
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uploaded by Mobilaero
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uploaded by Clutterdude
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uploaded by TWW369