E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 1312240 (Grade Series 11)

Sell Your Watch Save to My Collection Print Page Find a Mainspring Find a Balance Staff

Similar Watches For Sale

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

E. Howard Series 11 Pocket Watch

Check Price Source: eBay.com

1919 E. HOWARD Watch Co. RAILROAD CHRONOMETER 21J Series 11 Gold GF Pocket Watch

Check Price Source: eBay.com

1915 E Howard 16S 21J RR Grade Series 11 Original Case Pocket Watch Working

Check Price Source: eBay.com

E. Howard 21 Jewel Series 11 Railroad Pocket watch Works And Keeps Time

Check Price Source: eBay.com

Howard Series 11 21 Jewel Railroad Chronometer Running

Check Price Source: eBay.com

Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1312240

Access Date: May 16, 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 11

Manufacturer:	E. Howard Watch Co. (Keystone)
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	1312240
Grade:	Series 11
Variation:	Arrow.RecoilClick
Model:	E
Estimated Production Year:	1916
Run Quantity:	2,000
Grade/Model Run:	6 of 12
Grade/Model Total Production:	25,100
Size:	16s
Jewels:	21j
Jewel Setting:	Burnished Jewels
Movement Configuration:	Openface
Movement Finish:	Nickel
Movement Setting:	Lever
Wind Mechanism:	Pendant
Plate:	Bridge Plate
Regulator:	Micrometric
Hairspring:	Breguet
Standard Dial Type:	Single-Sunk
Adjusted:	Yes
Adjusted to Position:	Yes
Adjusted # of Positions:	5
Adjusted to Temperature:	Yes
Adjusted to Isochronism:	Yes
Railroad Grade:	Yes
Railroad Grade Classification:	Class A
Movement Markings:	E. Howard Watch Co. Boston U.S.A. Railroad Chronometer Series 11 [Star in Arrow] 21 Jewels R.R. Adjustment Temperature Five Positions Pat'd '08
Case:	Various
Run ID:	312.G6.16S194.M6.O224.L65.21J50
Database Version:	v52.647
Advanced Metrics
Members Only Data. Login or create a free account to unlock.
Registry Population: Scoped for This Run Only	10 (0.50%)
$ Estimated Value (12 Month Change):	-5.16% Analyzing 218 Sales

What is your watch really worth?

Access our value guide for current estimated values and price history.

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

Help Us Help Others By Improving the Database:

Does this information describe your movement accurately?

Yes

Why Might This Information Be Incorrect?

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.