E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 1108157 (Grade Series 5)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1108157

Access Date: November 21, 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:	1108157
Grade:	Series 5
Variation:	Hooked Bridge Jeweled Barrel
Model:	1907
Estimated Production Year:	1911
Run Quantity:	1,000
Grade/Model Run:	21 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
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 [Triangle in Arrow] Pat'd. '08 Extra Adjustment Five Positions Temperature [Some Also Marked "No. 5"]
Case:	Various
Run ID:	207.G22.16S141.161907M41.O129.L28.19J33
Database Version:	v52.450
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	10 (1.00%)
$ Estimated Value (12 Month Change):	-1.15% Analyzing 95 Sales
Research Note: #1108165 and #1108910: Reported as Marked "No. 5" #1108086 and #1108157: Verified as Marked "No. 5", #1108987: Verified as Not Marked "No. 5."

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Production Metrics Tree: Grade Series 5

Target Profile: 16S-M1907-19J-ONL-A5PTI-HOOKED BRIDGE JEWELED 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 JEWELED BARREL: 9,800 58.33%	Other: 4,200 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.