E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 1319170 (Grade Series 10)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1319170/movement

Access Date: November 26, 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 10

Manufacturer:	E. Howard Watch Co. (Keystone)
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	1319170
Grade:	Series 10
Model:	1907
Estimated Production Year:	1916
Run Quantity:	500
Grade/Model Run:	21 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:	313.G21.16S198.161907M86.O225.L68.21J51
Database Version:	v52.462
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	3.407%
Registry Population: Scoped for This Run Only	5 (1.00%)
$ Estimated Value (12 Month Change):	13.12% Analyzing 174 Sales

Value Guide

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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
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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.