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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1005065/link
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1005065/link
Access Date: December 15, 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:
-Series0-16s.jpg)
E. Howard Watch Co. (Keystone)
Grade: Series 0
| Manufacturer: | E. Howard Watch Co. (Keystone) |  |
| Manufacturer Location: | Waltham, Massachusetts | |
| Movement Serial Number: | 1005065 | |
| Grade: | Series 0 | |
| Variation: | Straight Bridge Jeweled Barrel | |
| Model: | Bridge | |
| Estimated Production Year: | 1903 | |
| Run Quantity: | 100 | |
| Grade/Model Run: | 2 of 2 | |
| Grade/Model Total Production: | 700 | |
| Variant Est. Production: | 100 (16S-MBRIDGE-23J-ONP) | |
| Size: | 16s | |
| Jewels: | 23j | |
| Jewel Material: | Ruby & Sapphire | |
| Jewel Setting: | Raised Gold Settings (Screw-Set) | |
| Movement Configuration: | Openface | |
| Movement Finish: | Nickel | |
| Finish Pattern: | Paralell | |
| Movement Setting: | Pendant | |
| Plate: | Bridge Plate | |
| Double Roller: | Yes | |
| 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 | |
| U.S. Patents: | 796162, 886387, 900183, 978612, 981667, 1062645 | |
| Movement Markings: | E. Howard Watch Co. Boston U.S.A. Adjusted 23 Jewels |
|
| Case: | Various | |
| Run ID: | 140.G8.16S108.M2.O80.P116.23J10 | |
| Database Version: | v52.508 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 0.30 | |
| PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 0.95 | |
| Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 0.019% | |
| Registry Population: Scoped for This Run Only | 3 (3.00%) | |
| $ Estimated Value (12 Month Change): | -4.66% Analyzing 96 Sales | |
|
Research Note: No Series Markings
|
||
Production Metrics Tree: Grade Series 0
Target Profile: 16S-MBRIDGE-23J-ONP-A5PTI-STRAIGHT BRIDGE JEWELED BARREL
| E. Howard Watch Co. (Keystone) Grade Series 0 (All Variations): 16,600 ETP | ||
| 16S: 16,600 100.00% 16s, Grade Series 0 |
||
| 16S-MBRIDGE: 700 4.22% 16s, Grade Series 0, Model Bridge |
Other: 15,900
Other Models or Unclassified |
|
| 16S-MBRIDGE-23J: 700 4.22% 16s, Grade Series 0, Model Bridge, 23 Jewels |
||
| 16S-MBRIDGE-23J-ONP: 100 0.60% 16s, Grade Series 0, Model Bridge, 23 Jewels, Openface/Pendant/Nickel |
Other: 600
Other Configs or Unclassified |
|
| 16S-MBRIDGE-23J-ONP-A5PTI: 100 0.60% | ||
| 16S-MBRIDGE-23J-ONP-A5PTI-STRAIGHT BRIDGE JEWELED BARREL: 100 0.60% | ||
Population Registry for This Run
| Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
|---|---|---|---|---|---|
|
There are 3 watches in the population registry for this run.
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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 · November 9, 2019
Serial Number 1005091 was reported as inaccurate.
Note: 23 Jewel
Curator Response: Thanks for the report. This run has been updated. [Images Verified, Jones & Horan Auction]
Changes since this report was submitted:
Grade changed from Series 5 to Series 0
Jewels changed from 19j to 23j
Factory Model changed from 1907 to Bridge
Railroad Grade changed from No to Yes
rjbeck 150 · June 22, 2019
Serial Number 1005091 was reported as accurate.
Changes since this report was submitted:
Grade changed from Series 5 to Series 0
Jewels changed from 19j to 23j
Factory Model changed from 1907 to Bridge
Movement Setting changed from Lever or Pendant to Pendant
Railroad Grade changed from No to Yes
dfchong 837 · June 15, 2019
Serial Number 1005091 was reported as accurate.
Changes since this report was submitted:
Grade changed from Series 5 to Series 0
Jewels changed from 19j to 23j
Factory Model changed from 1907 to Bridge
Movement Setting changed from Lever or Pendant to Pendant
Railroad Grade changed from No to Yes
