E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 1079915 (Grade Series 0)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1079915/movement

Access Date: November 27, 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:	1079915
Grade:	Series 0
Variation:	Hooked Bridge Jeweled Barrel
Model:	1907
Estimated Production Year:	1910
Run Quantity:	200
Grade/Model Run:	12 of 28
Grade/Model Total Production:	15,900
Variant Est. Production:	4,100 (16S-M1907-23J-ONL-A5PTI-HOOKED BRIDGE JEWELED BARREL)
Size:	16s
Jewels:	23j
Jewel Material:	Ruby & Sapphire
Jewel Setting:	Burnished Jewels
Movement Configuration:	Openface
Movement Finish:	Nickel
Movement Setting:	Lever
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:	Yes
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. Adjusted 23 Jewels Pat'd. '08 Special Adjustment Five Positions Temperature
Case:	Various
Run ID:	183.G14.16S128.161907M28.O110.L18.23J19
Database Version:	v52.467
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	2.498%
Registry Population: Scoped for This Run Only	3 (1.50%)
$ Estimated Value (12 Month Change):	-1.35% Analyzing 95 Sales
Research Note: #1079856 and #1079884: Reported as Marked "No. 0"

Value Guide

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Production Metrics Tree: Grade Series 0

Target Profile: 16S-M1907-23J-ONL-A5PTI-HOOKED BRIDGE JEWELED BARREL

E. Howard Watch Co. (Keystone) Grade Series 0 (All Variations): 16,750 ETP
16S: 16,750 100.00% 16s, Grade Series 0
16S-M1907: 15,900 94.93% 16s, Grade Series 0, Model 1907			Other: 850 Other Models or Unclassified
16S-M1907-23J: 15,900 94.93% 16s, Grade Series 0, Model 1907, 23 Jewels
16S-M1907-23J-ONL: 11,600 69.25% 16s, Grade Series 0, Model 1907, 23 Jewels, Openface/Lever/Nickel		Other: 4,300 Other Configs or Unclassified
16S-M1907-23J-ONL-A5PTI: 11,600 69.25%
16S-M1907-23J-ONL-A5PTI-HOOKED BRIDGE JEWELED BARREL: 4,100 24.48%	Other: 7,500 Other Variants or Unclassified

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.