E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 1096677 (Grade Series 1)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1096677/movement

Access Date: November 29, 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 1

Manufacturer:	E. Howard Watch Co. (Keystone)
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	1096677
Grade:	Series 1
Variation:	Type 3A
Model:	1907
Estimated Production Year:	1910
Run Quantity:	1,500
Grade/Model Run:	2 of 7
Grade/Model Total Production:	5,700
Variant Est. Production:	1,500 (16S-M1907-21J-ONL-A0PTI-TYPE 3A)
Size:	16s
Jewels:	21j
Jewel Material:	Ruby & Sapphire
Jewel Setting:	Burnished Jewels
Movement Configuration:	Openface
Movement Finish:	Nickel
Finish Pattern:	Parallel
Movement Inlay Color:	Gilt
Movement Setting:	Lever
Plate:	Bridge Plate
Bridge Type:	Center
Double Roller:	Yes
Barrel:	Safety
Regulator:	Reed
Hairspring:	Breguet
Pallet Jewel Material:	Sapphire
Standard Dial Type:	Double-Sunk
Adjusted:	Yes
Adjusted to Position:	Yes
Adjusted # of Positions:	3 or 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. Adjusted 21 Jewels [Star in Arrow] Pat'd. '08 Extra Adjustment Five Positions Temperature
Case:	Various
Run ID:	193.G4.16S132.161907M32.O117.L22.21J13
Database Version:	v52.469
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	17.16
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	60.28
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	1.091%
Registry Population: Scoped for This Run Only	6 (0.40%)

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Production Metrics Tree: Grade Series 1

Target Profile: 16S-M1907-21J-ONL-A0PTI-TYPE 3A

E. Howard Watch Co. (Keystone) Grade Series 1 (All Variations): 6,700 ETP
16S: 6,700 100.00% 16s, Grade Series 1
16S-M1907: 5,700 85.07% 16s, Grade Series 1, Model 1907			Other: 1,000 Other Models or Unclassified
16S-M1907-21J: 5,500 82.09% 16s, Grade Series 1, Model 1907, 21 Jewels		Other: 200 Other Jewels or Unclassified
16S-M1907-21J-ONL: 5,500 82.09% 16s, Grade Series 1, Model 1907, 21 Jewels, Openface/Lever/Nickel
16S-M1907-21J-ONL-A0PTI: 5,500 82.09%
16S-M1907-21J-ONL-A0PTI-TYPE 3A: 1,500 22.39%	Other: 4,000 Other Variants or Unclassified

Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
There are 6 watches in the population registry for this run with 4 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.