E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 959103 (Grade Series 4)

Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/959103

Access Date: July 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 4

Manufacturer:	E. Howard Watch Co. (Keystone)
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	959103
Grade:	Series 4
Model:	1905
Estimated Production Year:	1908
Run Quantity:	1,000
Grade/Model Run:	13 of 26
Grade/Model Total Production:	16,710
Variant Est. Production:	7,480 (16S-M1905-17J-ONP)
Size:	16s
Jewels:	17j
Jewel Material:	Ruby & Sapphire
Jewel Setting:	Gold Settings (Screw-Set)
Movement Configuration:	Openface
Movement Finish:	Nickel
Finish Pattern:	Checkerboard
Movement Setting:	Pendant
Plate:	3/4 Plate
Double Roller:	Yes
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:	No
Dial Feet Locations:	10.7, 24.3, 48.9
U.S. Patents:	781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667
Case:	Various
Run ID:	88.G13.16S67.161905M61.O51.P79.17J64
Database Version:	v52.365
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	37.87
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	139.82
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	2.210%
Registry Population:	20 (2.00%)
$ Estimated Value (12 Month Change):	-16.29% Analyzing 69 Sales

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Production Metrics Tree: Grade Series 4

Target Profile: 16S-M1905-17J-ONP-A5PTI

E. Howard Watch Co. (Keystone) Grade Series 4 (All Variations): 16,710 ETP
16S: 16,710 100.00% 16s, Grade Series 4
16S-M1905: 16,710 100.00% 16s, Grade Series 4, Model 1905
16S-M1905-17J: 16,710 100.00% 16s, Grade Series 4, Model 1905, 17 Jewels
16S-M1905-17J-ONP: 7,480 44.76% 16s, Grade Series 4, Model 1905, 17 Jewels, Openface/Pendant/Nickel	Other: 9,230 Other Configs or Unclassified
16S-M1905-17J-ONP-A5PTI: 7,480 44.76%

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.