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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1050492
Access Date: November 01, 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 Pocket Watch
E. Howard Watch Co. (Keystone)

Grade: Series 5

Manufacturer: E. Howard Watch Co. (Keystone) Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 1050492 Question Mark
Grade: Series 5 Question Mark
Variation: Straight Bridge Jeweled Barrel Question Mark
Model: 1907 Question Mark
Estimated Production Year: 1909 Question Mark
Run Quantity: 700 Question Mark
Grade/Model Run: 7 of 26 Question Mark
Grade/Model Total Production: 16,400 Question Mark
Variant Est. Production: 3,000 (16S-M1907-19J-ONL-A5PTI-STRAIGHT BRIDGE JEWELED BARREL) Question Mark
Size: 16s Question Mark
Jewels: 19j Question Mark
Jewel Material: Ruby & Sapphire Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Movement Setting: Lever Question Mark
Plate: Bridge Plate Question Mark
Bridge Type: Center Question Mark
Double Roller: Yes Question Mark
Barrel: Jeweled Safety Question Mark
Regulator: Reed Question Mark
Hairspring: Breguet Question Mark
Pallet Jewel Material: Sapphire Question Mark
Standard Dial Type: Double-Sunk Question Mark
Adjusted: Yes Question Mark
Adjusted to Position: Yes Question Mark
Adjusted # of Positions: 5 Question Mark
Adjusted to Temperature: Yes Question Mark
Adjusted to Isochronism: Yes Question Mark
Railroad Grade: Yes Question Mark
Dial Feet Locations: 10.7, 24.3, 48.9 Question Mark
Movement Markings: E. Howard Watch Co.
Boston U.S.A.
Adjusted
19 Jewels
Case: Various Question Mark
Run ID: 148.G8.16S113.161907M14.O84.L12.19J13 Question Mark
Database Version: v52.428 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration		 43.95 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration		 154.56 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration		 2.794% Question Mark
Registry Population:
Scoped for This Run Only		4 (0.57%) Question Mark
$ Estimated Value (12 Month Change): -19.20% Analyzing 92 Sales Question Mark
Research Note: Serial number marked on pillar plate.
Value Guide
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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): 16,800 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-ONL: 14,000 83.33%
16s, Grade Series 5, Model 1907, 19 Jewels, Openface/Lever/Nickel 		Other: 2,400
Other Configs or Unclassified
16S-M1907-19J-ONL-A5PTI: 14,000 83.33%
16S-M1907-19J-ONL-A5PTI-STRAIGHT BRIDGE JEWELED BARREL: 3,000 17.86% Other: 11,000
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 3 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.

ebsrods Supporter 127 · September 9, 2024

Serial Number 1050562 was reported as accurate.

Anonymous · November 18, 2023

Serial Number 1050641 was reported as inaccurate.

Note: Mine is a 16 size 19 jewel adjusted model 1907
series 5 with 2 finger bridge nickel movement.
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Changes since this report was submitted:
Grade changed from Missing Data to Series 5

Anonymous · January 3, 2020

Serial Number 1050132 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 5 Pocket Watch