E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 953496 (Grade Series 0)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/953496/movement

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 0

Manufacturer:	E. Howard Watch Co. (Keystone)
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	953496
Grade:	Series 0
Variation:	Straight Bridge Jeweled Barrel
Model:	1907
Estimated Production Year:	1908
Run Quantity:	150
Grade/Model Run:	4 of 28
Grade/Model Total Production:	15,900
Variant Est. Production:	1,250 (16S-M1907-23J-ONP-A5PTI-STRAIGHT BRIDGE JEWELED BARREL)
Size:	16s
Jewels:	23j
Jewel Material:	Ruby & Sapphire
Movement Configuration:	Openface
Movement Finish:	Nickel
Finish Pattern:	Parallel
Movement Setting:	Pendant
Plate:	Bridge Plate
Bridge Type:	Center
Double Roller:	Yes
Barrel:	Jeweled Safety
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:	No
Dial Feet Locations:	10.7, 24.3, 48.9
U.S. Patents:	796162, 886387, 900183, 978612, 981667, 1062645
Movement Markings:	E. Howard Watch Co. Boston U.S.A. 23 Jewels Adjusted
Case:	Various
Run ID:	84.G4.16S61.161907M4.O50.P75.23J6
Database Version:	v52.517
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	39.29
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	138.14
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	2.496%
Registry Population: Scoped for This Run Only	2 (1.33%)
$ Estimated Value (12 Month Change):	-4.66% Analyzing 96 Sales
Research Note: #953495: Hunting instead of Open Face

Value Guide

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Production Metrics Tree: Grade Series 0

Target Profile: 16S-M1907-23J-ONP-A5PTI-STRAIGHT BRIDGE JEWELED BARREL

E. Howard Watch Co. (Keystone) Grade Series 0 (All Variations): 16,600 ETP
16S: 16,600 100.00% 16s, Grade Series 0
16S-M1907: 15,900 95.78% 16s, Grade Series 0, Model 1907			Other: 700 Other Models or Unclassified
16S-M1907-23J: 15,900 95.78% 16s, Grade Series 0, Model 1907, 23 Jewels
16S-M1907-23J-ONP: 1,450 8.73% 16s, Grade Series 0, Model 1907, 23 Jewels, Openface/Pendant/Nickel		Other: 14,450 Other Configs or Unclassified
16S-M1907-23J-ONP-A5PTI: 1,450 8.73%
16S-M1907-23J-ONP-A5PTI-STRAIGHT BRIDGE JEWELED BARREL: 1,250 7.53%	Other: 200 Other Variants or Unclassified

Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
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