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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/970854
Access Date: April 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 Pocket Watch
E. Howard Watch Co. (Keystone)

Grade: Series 5

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 970854
Grade: Series 5
Variation: Straight Bridge Jeweled Barrel
Model: 1907
Estimated Production Year: 1910
Run Quantity: 200
Grade/Model Run: 3 of 27
Grade/Model Total Production: 16,600
Variant Est. Production: 700 (16S-M1907-19J-HNP-A5PTI-STRAIGHT 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: 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: No
Dial Feet Locations: 10.7, 24.3, 48.9
Case: Various
Run ID: 98.G3.16S80.161907M8.H36.P81.19J6
Database Version: v52.245
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration		 4.21
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration		 13.91
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration		 0.271%
Registry Population: 1 (0.50%)
$ Estimated Value (12 Month Change): -7.74% Analyzing 88 Sales
Research Note: Escape Wheel Cap-Jewelled.
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Production Metrics Tree: Grade Series 5

Target Profile: 16S-M1907-19J-HNP-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
16S-M1907: 16,600 100.00%
16s, Grade Series 5, Model 1907
16S-M1907-19J: 16,600 100.00%
16s, Grade Series 5, Model 1907, 19 Jewels
16S-M1907-19J-HNP: 1,300 7.83%
16s, Grade Series 5, Model 1907, 19 Jewels, Hunting/Pendant/Nickel 		Other: 15,300
Other Configs or Unclassified
16S-M1907-19J-HNP-A5PTI: 1,300 7.83%
16S-M1907-19J-HNP-A5PTI-STRAIGHT BRIDGE JEWELED BARREL: 700 4.22%

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
There is 1 watch 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.

Mobilaero Top Contributor Supporter 293 · February 15, 2023

Serial Number 970854 was reported as inaccurate.

Note: Sorry, my previous is an error

My example (970854) is a hunter, but it is
pendant set, not lever set.
Curator Response: Thanks for the report. The database has been updated accordingly.
Changes since this report was submitted:
Movement Setting changed from Lever to Pendant

Anonymous · November 2, 2019

Serial Number 970808 was reported as inaccurate.

Note: Everything appears correct except possibly the
production date . This is one of those with the 05
patent hidden under the 4th wheel and cannot be
viewed without taking the watch apart. This is an
early one.
Changes since this report was submitted:
Grade changed from Series 1 to Series 5
E. Howard Watch Co. (Keystone) Grade Series 5 Pocket Watch