E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 1100388 (Grade Series 1)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1100388

Access Date: December 22, 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 1

Manufacturer:	E. Howard Watch Co. (Keystone)
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	1100388
Grade:	Series 1
Variation:	Mixed
Model:	1907
Estimated Production Year:	1910
Run Quantity:	1,500
Grade/Model Run:	3 of 7
Grade/Model Total Production:	5,700
Variant Est. Production:	3,000 (16S-M1907-21J-ONL-A0PTI-MIXED)
Size:	16s
Jewels:	21j
Jewel Material:	Ruby & Sapphire
Jewel Setting:	Burnished Jewels
Movement Configuration:	Openface
Movement Finish:	Nickel
Finish Pattern:	Parallel
Movement Inlay Color:	Black
Movement Setting:	Lever
Plate:	Bridge Plate
Bridge Type:	Center
Double Roller:	Yes
Barrel:	Safety
Regulator:	Reed
Hairspring:	Breguet
Pallet Jewel Material:	Sapphire
Standard Dial Type:	Double-Sunk
Adjusted:	Yes
Adjusted to Position:	Yes
Adjusted # of Positions:	3 or 5
Adjusted to Temperature:	Yes
Adjusted to Isochronism:	Yes
Railroad Grade:	Yes
Dial Feet Locations:	10.7, 24.3, 48.9
Movement Markings:	E. Howard Watch Co. Boston U.S.A. Adjusted 21 Jewels [Star in Arrow] Pat'd. '08 Extra Adjustment Five Positions Temperature
Case:	Various
Run ID:	195.G5.16S133.161907M33.O119.L23.21J14
Database Version:	v52.517
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	17.16
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	60.28
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	1.090%
Registry Population: Scoped for This Run Only	10 (0.67%)
Research Note: Mixed Run: Marked "No. 1" or "No. 10" or no series marking. #1100348 and #1100388: Marked "No. 10."

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Production Metrics Tree: Grade Series 1

Target Profile: 16S-M1907-21J-ONL-A0PTI-MIXED

E. Howard Watch Co. (Keystone) Grade Series 1 (All Variations): 6,700 ETP
16S: 6,700 100.00% 16s, Grade Series 1
16S-M1907: 5,700 85.07% 16s, Grade Series 1, Model 1907			Other: 1,000 Other Models or Unclassified
16S-M1907-21J: 5,500 82.09% 16s, Grade Series 1, Model 1907, 21 Jewels		Other: 200 Other Jewels or Unclassified
16S-M1907-21J-ONL: 5,500 82.09% 16s, Grade Series 1, Model 1907, 21 Jewels, Openface/Lever/Nickel
16S-M1907-21J-ONL-A0PTI: 5,500 82.09%
16S-M1907-21J-ONL-A0PTI-MIXED: 3,000 44.78%	Other: 2,500 Other Variants or Unclassified

Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
There are 10 watches in the population registry for this run with 5 images. Create a FREE account or login to view the population registry and add your watch to the registry. Create a Free Account

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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.

cjbrem Supporter 957 · September 3, 2024

Serial Number 1101197 was reported as accurate.

weepinglion 48 · August 27, 2024

Serial Number 1101376 was reported as accurate.

MoatsJustin1 top-contributor 5272 · December 14, 2023

Serial Number 1101105 was reported as accurate.

Anonymous · September 22, 2022

Serial Number 1101143 was reported as accurate.

CJEmpire3 113 · December 2, 2021

Serial Number 1101177 was reported as accurate.

Anonymous · May 2, 2021

Serial Number 1100360 was reported as accurate.

Anonymous · December 11, 2020

Serial Number 1100199 was reported as accurate.

ABUMALEK 97 · April 29, 2020

Serial Number 1100713 was reported as accurate.

Schmidty Supporter 7 · February 10, 2020

Serial Number 1101466 was reported as accurate.

Harlton Supporter 98 · January 27, 2020

Serial Number 1100084 was reported as accurate.

cjbrem Supporter 957 · January 4, 2020

Serial Number 1100329 was reported as accurate.

Anonymous · November 20, 2019

Serial Number 1101088 was reported as accurate.

Anonymous · November 17, 2019

Serial Number 1100426 was reported as accurate.

Anonymous · July 21, 2019

Serial Number 1101077 was reported as accurate.

tink5249 2 · May 25, 2019

Serial Number 1100506 was reported as accurate.

Anonymous · May 22, 2019

Serial Number 1100199 was reported as accurate.

cjbrem Supporter 957 · March 24, 2019

Serial Number 1100329 was reported as accurate.

Anonymous · February 28, 2019

Serial Number 1100506 was reported as accurate.

Anonymous · February 18, 2019

Serial Number 1101108 was reported as inaccurate.

Note: The series 1, 21J, safety barrel movement is a RR
grade movement, It is lever set and adjusted to 5
positions

Curator Response: Thanks for the report. The setting mechanism for this run was previously undetermined. Being lever-set, your watch would absolutely qualify for railroad service.

Changes since this report was submitted:

Movement Setting changed from Lever or Pendant to Lever

Railroad Grade changed from No to Yes