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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1088998
Access Date: June 07, 2023

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

Grade: Series 7

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1088998
Grade: Series 7
Model: 1908
Estimated Production Year: 1911
Run Quantity: 3,000
Grade/Model Total Production: 51,850
Variant Est. Production: 46,850 (12S-M1908-17J-ONP)
Size: 12s
Jewels: 17j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Pendant
Plate: Bridge Plate
Double Roller: Yes
Hairspring: Breguet
Adjusted: Yes
Adjusted # of Positions: 3
Adjusted to Temperature: Yes
Railroad Grade: No
Case: Various
Database Version: v50.869
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration		 51.00
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration		 135.55
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration		 3.443%
Registry Population: 3 (0.10%)
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Production Metrics Tree: Grade Series 7

Target Profile: 12S-M1908-17J-ONP-A3PT

E. Howard Watch Co. (Keystone) Grade Series 7 (All Variations): 226,350 ETP
12S: 226,350 100.00%
12s, Grade Series 7
12S-M1908: 51,850 22.91%
12s, Grade Series 7, Model 1908		 Other: 174,500
Other Models or Unclassified
12S-M1908-17J: 51,850 22.91%
12s, Grade Series 7, Model 1908, 17 Jewels
12S-M1908-17J-ONP: 46,850 20.70%
12s, Grade Series 7, Model 1908, 17 Jewels, Openface/Pendant/Nickel 		Other: 5,000
Other Configs or Unclassified
12S-M1908-17J-ONP-A3PT: 46,850 20.70%

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1
Image Credit: ebsrods 		1087507 #507 Collection April 19, 2023
2
Image Credit: rfbtxoh 		1087588 #588 Collection January 04, 2021
3
Image Credit: netmind 		1088998 #1998 Collection May 25, 2023
Standard Deviation of Known Examples: 838.43 (Expected: 866.17, Δ27.74/0.92%)

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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 78 · April 19, 2023

Serial Number 1087507 was reported as accurate.

cmdraven 3639 · January 17, 2022

Serial Number 1088870 was reported as accurate.

Anonymous · August 9, 2021

Serial Number 1087855 was reported as accurate.

Anonymous · July 6, 2021

Serial Number 1088020 was reported as accurate.

Anonymous · January 4, 2021

Serial Number 1087588 was reported as accurate.

Anonymous · December 29, 2020

Serial Number 1090000 was reported as accurate.

Anonymous · January 13, 2020

Serial Number 1087807 was reported as accurate.

cmdraven 3639 · August 20, 2019

Serial Number 1087807 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 7 Pocket Watch
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