E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 1170293 (Grade Series 10)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1170293

Access Date: June 08, 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 10

Manufacturer:	E. Howard Watch Co. (Keystone)
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	1170293
Grade:	Series 10
Variation:	Ser. 10
Model:	1907
Estimated Production Year:	1912
Run Quantity:	300
Grade/Model Total Production:	17,800
Variant Est. Production:	15,550 (16S-M1907-21J-ONL)
Size:	16s
Jewels:	21j
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
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
Case:	Various
Database Version:	v50.869
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	51.73
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	137.50
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	3.492%
Registry Population:	3 (1.00%)

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Production Metrics Tree: Grade Series 10

Target Profile: 16S-M1907-21J-ONL-A5PTI-SER. 10

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: 15,550 87.36% 16s, Grade Series 10, Model 1907, 21 Jewels, Openface/Lever/Nickel	Other: 2,250 Other Configs or Unclassified
16S-M1907-21J-ONL-A5PTI: 15,550 87.36%
16S-M1907-21J-ONL-A5PTI-SER. 10: 15,550 87.36%

Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
1	Image Credit: Faberius	1170049	#49	Collection	April 18, 2019
2		1170263	#263	Collection	June 14, 2014
3		1170274	#274	Collection	June 03, 2019
Standard Deviation of Known Examples: 126.85 (Expected: 86.75, Δ40.10/13.37%)

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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.

Anonymous · August 9, 2020

Serial Number 1170012 was reported as inaccurate.

Note: E Howard was in Boston, Mass., not Waltham.

Curator Response: Thanks for the report. However, it is incorrect. While the movements are marked "Boston," the company was operated out of the old factory used by the U.S. Watch Company in Waltham, Massachusetts.

Changes since this report was submitted:

Movement Setting changed from Mixed to Lever

Railroad Grade changed from No to Yes