Pocket Watch Database

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: 1256402
Grade: Series 7
Model: 1912
Estimated Production Year: 1913
Run Quantity: 13,000
Total Production: 172,700
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
Registry Population: 11 (0.08%)
Database Version: v49.432

Production Metrics Tree: Grade Series 7

Target Profile: 12S-M1912-17J-ONP-A3PT

E. Howard Watch Co. (Keystone) Grade Series 7 (All Variations): 224,550 ETP
12S: 224,550 100.00%
12s, Grade Series 7
12S-M1912: 172,700 76.91%
12s, Grade Series 7, Model 1912
Other: 51,850
Other Models or Unclassified
12S-M1912-17J: 172,700 76.91%
12s, Grade Series 7, Model 1912, 17 Jewels
12S-M1912-17J-ONP: 172,700 76.91%
12s, Grade Series 7, Model 1912, 17 Jewels, Openface/Pendant/Nickel
12S-M1912-17J-ONP-A3PT: 172,700 76.91%

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 1249523 #2523 Collection April 02, 2018
2 1251135 #4135 Collection October 22, 2015
3 1251505 #4505 Collection June 23, 2021
4 1252599 #5599 Collection May 15, 2022
5 1253004 #6004 Collection September 20, 2019
6 1254743 #7743 Collection March 04, 2018
7 1256004 #9004 Collection December 10, 2021
8 1256336 #9336 Collection October 15, 2022
9 1256402 #9402 Collection April 20, 2019
10 1259408 #12408 Collection July 07, 2019
11 1259509 #12509 Collection August 10, 2015
Standard Deviation of Known Examples: 3,307.01 (Expected: 3,752.92, Δ445.91/3.43%)

Help Us Help Others By Improving the Database:

Does this information describe your movement accurately?

Data Verification Reports

1247001
Verification Serial Map
1260000

shortjoe 12 · May 15, 2022

Serial Number 1252599 was reported as accurate.

Anonymous · May 15, 2022

Serial Number 1252599 was reported as accurate.

okiejohn 310 · December 10, 2021

Serial Number 1256004 was reported as accurate.

Rcardkidz 2748 · August 15, 2021

Serial Number 1255249 was reported as accurate.

Anonymous · July 22, 2021

Serial Number 1256425 was reported as accurate.

TerryfromCanada Supporter 355 · March 17, 2021

Serial Number 1252057 was reported as accurate.

Anonymous · February 23, 2021

Serial Number 1254743 was reported as accurate.

Anonymous · September 18, 2020

Serial Number 1250459 was reported as accurate.

snellingt 32 · August 21, 2020

Serial Number 1254213 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

Anonymous · August 11, 2020

Serial Number 1247840 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

Anonymous · July 19, 2020

Serial Number 1251788 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

Anonymous · May 31, 2020

Serial Number 1253137 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

KBean001 34 · May 28, 2020

Serial Number 1250259 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

KBean001 34 · May 28, 2020

Serial Number 1250259 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

Anonymous · May 16, 2020

Serial Number 1250259 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

cmdraven 3507 · April 19, 2020

Serial Number 1249505 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

Anonymous · April 12, 2020

Serial Number 1257400 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

Anonymous · April 7, 2020

Serial Number 1248990 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

Anonymous · March 26, 2020

Serial Number 1257400 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

Walter 63 · February 20, 2020

Serial Number 1255564 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

Anonymous · September 21, 2019

Serial Number 1249185 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

Anonymous · August 30, 2019

Serial Number 1258177 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface

Anonymous · June 23, 2019

Serial Number 1259408 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface
Plate changed from 3/4 to Bridge

Anonymous · May 14, 2019

Serial Number 1259007 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface
Plate changed from 3/4 to Bridge

Anonymous · March 10, 2019

Serial Number 1250513 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface
Plate changed from 3/4 to Bridge

Anonymous · September 23, 2018

Serial Number 1248900 was reported as accurate.

Changes since this report was submitted:
Grade changed from ? to Series 7
E. Howard Watch Co. (Keystone) Grade Series 7 Pocket Watch