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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/935968
Access Date: July 29, 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 4 Pocket Watch
E. Howard Watch Co. (Keystone)

Grade: Series 4

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 935968
Grade: Series 4
Model: 1905
Estimated Production Year: 1907
Run Quantity: 200
Grade/Model Run: 5 of 26
Grade/Model Total Production: 16,710
Variant Est. Production: 7,480 (16S-M1905-17J-ONP)
Size: 16s
Jewels: 17j
Jewel Material: Ruby & Sapphire
Jewel Setting: Gold Settings (Screw-Set)
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: Checkerboard
Movement Setting: Pendant
Plate: 3/4 Plate
Double Roller: Yes
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
U.S. Patents: 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667
Case: Various
Run ID: 62.G5.16S41.161905M40.O37.P53.17J43
Database Version: v52.365
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration		 37.87
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration		 139.82
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration		 2.210%
Registry Population: 4 (2.00%)
$ Estimated Value (12 Month Change): -16.29% Analyzing 69 Sales
Value Guide
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Production Metrics Tree: Grade Series 4

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

E. Howard Watch Co. (Keystone) Grade Series 4 (All Variations): 16,710 ETP
16S: 16,710 100.00%
16s, Grade Series 4
16S-M1905: 16,710 100.00%
16s, Grade Series 4, Model 1905
16S-M1905-17J: 16,710 100.00%
16s, Grade Series 4, Model 1905, 17 Jewels
16S-M1905-17J-ONP: 7,480 44.76%
16s, Grade Series 4, Model 1905, 17 Jewels, Openface/Pendant/Nickel 		Other: 9,230
Other Configs or Unclassified
16S-M1905-17J-ONP-A5PTI: 7,480 44.76%

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