Pocket Watch Database

Movement Specs Production Pop. Registry 8 Value Ad Archive 1 For Sale Save to My Collection Print Page Find a Mainspring Find a Balance Staff
Save to My Collection Print Page Find a Mainspring Find a Balance Staff
Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/913619
Access Date: February 22, 2025

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 4 Pocket Watch
E. Howard Watch Co. (Keystone)

Grade: Series 4

Manufacturer: E. Howard Watch Co. (Keystone) Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 913619 Question Mark
Grade: Series 4 Question Mark
Model: 1905 Question Mark
Estimated Production Year: 1906 Question Mark
Run Quantity: 100 Question Mark
Grade/Model Run: 2 of 24 Question Mark
Grade/Model Total Production: 16,350 Question Mark
Variant Est. Production: 4,800 (16S-M1905-17J-ONL) Question Mark
Size: 16s Question Mark
Jewels: 17j Question Mark
Jewel Material: Ruby & Sapphire Question Mark
Jewel Setting: Gold Settings (Screw-Set) Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Finish Pattern: Checkerboard Question Mark
Movement Setting: Lever or Pendant Question Mark
Plate: 3/4 Plate Question Mark
Double Roller: Yes 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
U.S. Patents: 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667 Question Mark
Case: Various Question Mark
Run ID: 50.G2.16S26.161905M25.O31.L1.17J29 Question Mark
Database Version: v52.612 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration		 36.79 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration		 129.34 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration		 2.336% Question Mark
Registry Population:
Scoped for This Run Only		8 (8.00%) Question Mark
Research Note: Mixed Run: Lever-Set and Pendant-Set Movements. #913644 Reported as Series 2 with Parallel Bar Pattern.
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Production Metrics Tree: Grade Series 4

Target Profile: 16S-M1905-17J-ONL-A5PTI

E. Howard Watch Co. (Keystone) Grade Series 4 (All Variations): 16,350 ETP
16S: 16,350 100.00%
16s, Grade Series 4
16S-M1905: 16,350 100.00%
16s, Grade Series 4, Model 1905
16S-M1905-17J: 16,350 100.00%
16s, Grade Series 4, Model 1905, 17 Jewels
16S-M1905-17J-ONL: 4,800 29.36%
16s, Grade Series 4, Model 1905, 17 Jewels, Openface/Lever or Pendant/Nickel 		Other: 11,550
Other Configs or Unclassified
16S-M1905-17J-ONL-A5PTI: 4,800 29.36%

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
There are 8 watches in the population registry for this run with 1 image.
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E. Howard Watch Co. (Keystone) Grade Series 4 Pocket Watch