E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 1143508 (Grade Series 5)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1143508/movement

Access Date: November 28, 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 5

Manufacturer:	E. Howard Watch Co. (Keystone)
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	1143508
Grade:	Series 5
Variation:	Hooked Bridge Going Barrel
Model:	1907
Estimated Production Year:	1909
Run Quantity:	1,000
Grade/Model Run:	25 of 26
Grade/Model Total Production:	16,400
Variant Est. Production:	1,200 (16S-M1907-19J-ONL-A5PTI-HOOKED BRIDGE GOING BARREL)
Size:	16s
Jewels:	19j
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:	Going
Regulator:	Reed
Hairspring:	Breguet
Pallet Jewel Material:	Sapphire
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. Series 5 19 Jewels [Triangle in Arrow] Pat'd. Extra Adjustment Five Positions Temperature
Case:	Various
Run ID:	238.G26.16S159.161907M57.O156.L40.19J39
Database Version:	v52.467
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	43.95
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	154.56
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	2.794%
Registry Population: Scoped for This Run Only	5 (0.50%)
$ Estimated Value (12 Month Change):	-1.15% Analyzing 96 Sales
Research Note: #1143517: Verified with Jeweled Safety Barrel

Value Guide

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Production Metrics Tree: Grade Series 5

Target Profile: 16S-M1907-19J-ONL-A5PTI-HOOKED BRIDGE GOING BARREL

E. Howard Watch Co. (Keystone) Grade Series 5 (All Variations): 16,800 ETP
16S: 16,800 100.00% 16s, Grade Series 5
16S-M1907: 16,400 97.62% 16s, Grade Series 5, Model 1907			Other: 400 Other Models or Unclassified
16S-M1907-19J: 16,400 97.62% 16s, Grade Series 5, Model 1907, 19 Jewels
16S-M1907-19J-ONL: 14,000 83.33% 16s, Grade Series 5, Model 1907, 19 Jewels, Openface/Lever/Nickel		Other: 2,400 Other Configs or Unclassified
16S-M1907-19J-ONL-A5PTI: 14,000 83.33%
16S-M1907-19J-ONL-A5PTI-HOOKED BRIDGE GOING BARREL: 1,200 7.14%	Other: 12,800 Other Variants or Unclassified

Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
There are 5 watches in the population registry for this run with 2 images. Create a FREE account or login to view the population registry and add your watch to the registry. Create a Free Account

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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.