E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 1239474 (Grade Series 10)

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1912 E Howard Railroad Grade Series 10 Pocket Watch 21J 16S Model 1907 WORKS

Check Price Source: eBay.com

Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1239474

Access Date: February 03, 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 10

Manufacturer:	E. Howard Watch Co. (Keystone)
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	1239474
Grade:	Series 10
Model:	1907
Estimated Production Year:	1913
Run Quantity:	850
Grade/Model Run:	18 of 21
Grade/Model Total Production:	17,800
Variant Est. Production:	15,650 (16S-M1907-21J-ONL)
Size:	16s
Jewels:	21j
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:	Going
Regulator:	Reed
Hairspring:	Breguet
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
Movement Markings:	E. Howard Watch Co. Boston U.S.A. 21 Jewels Series 10 [Star in Arrow] Pat'd. '10 Extra Adjustment Five Positions Temperature
Case:	Various
Run ID:	289.G18.16S185.161907M78.O203.L58.21J44
Database Version:	v52.591
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	53.59
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	188.45
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	3.403%
Registry Population: Scoped for This Run Only	4 (0.47%)
$ Estimated Value (12 Month Change):	6.64% Analyzing 177 Sales

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Production Metrics Tree: Grade Series 10

Target Profile: 16S-M1907-21J-ONL-A5PTI

E. Howard Watch Co. (Keystone) Grade Series 10 (All Variations): 17,800 ETP
16S: 17,800 100.00% 16s, Grade Series 10
16S-M1907: 17,800 100.00% 16s, Grade Series 10, Model 1907
16S-M1907-21J: 17,800 100.00% 16s, Grade Series 10, Model 1907, 21 Jewels
16S-M1907-21J-ONL: 15,650 87.92% 16s, Grade Series 10, Model 1907, 21 Jewels, Openface/Lever/Nickel	Other: 2,150 Other Configs or Unclassified
16S-M1907-21J-ONL-A5PTI: 15,650 87.92%

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 with 1 image. 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 1012 · May 3, 2024

Serial Number 1239520 was reported as accurate.

Chronified 212 · October 11, 2021

Serial Number 1239885 was reported as accurate.

Changes since this report was submitted:

Movement Setting changed from Mixed to Lever

Railroad Grade changed from No to Yes

ebsrods Supporter 130 · May 16, 2021

Serial Number 1239206 was reported as inaccurate.

Note: Should be railroad grade.

Curator Response: Thanks for the report. This is a mixed run with lever-set and pendant-set movements. The lever-set movements would have qualified for railroad service, as you correctly indicated.

Changes since this report was submitted:

Movement Setting changed from Mixed to Lever

Railroad Grade changed from No to Yes