E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 1078407 (Grade Series 5)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1078407

Access Date: May 12, 2025

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:	1078407
Grade:	Series 5
Variation:	Hooked Bridge Jeweled Barrel
Model:	1907
Estimated Production Year:	1910
Run Quantity:	500
Grade/Model Run:	14 of 26
Grade/Model Total Production:	16,400
Variant Est. Production:	9,800 (16S-M1907-19J-ONL-A5PTI-HOOKED BRIDGE JEWELED BARREL)
Size:	16s
Jewels:	19j
Jewel Material:	Ruby & Sapphire
Movement Configuration:	Openface
Movement Finish:	Nickel
Movement Setting:	Lever
Wind Mechanism:	Pendant
Plate:	Bridge Plate
Bridge Type:	Center
Double Roller:	Yes
Barrel:	Jeweled Safety
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. Adjusted 19 Jewels Pat'd. '08 Extra Adjustment Five Positions Temperature
Case:	Various
Run ID:	184.G15.16S125.161907M25.O110.L15.19J25
Database Version:	v52.646
Advanced Metrics
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Registry Population: Scoped for This Run Only	3 (0.60%)
$ Estimated Value (12 Month Change):	-2.40% Analyzing 105 Sales
Research Note: #1078270: Reported as Marked "No. 5"

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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.