Waltham Pocket Watch: Serial Number 7640499 (Grade No. 20)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/waltham/7640499/movement

Access Date: November 23, 2024

From the American Horology Archive:

American Waltham Watch Co.

Grade: No. 20

Manufacturer:	Waltham
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	7640499
Grade:	No. 20
Model:	1888
Estimated Production Year:	1896
Run Quantity:	1,100
Grade/Model Run:	113 of 138
Grade/Model Total Production:	305,873
Size:	16s
Jewels:	7j
Movement Configuration:	Openface
Movement Finish:	Gilt
Movement Setting:	Pendant
Plate:	3/4 Plate
Hairspring:	Breguet
Adjusted:	No
Railroad Grade:	No
Case:	Various
Run ID:	15583.G113.16S827.161888M501.O10197.P2095.7J4415
Data Research:	1954 Waltham "Gray Book" List NAWCC Waltham Serial Digest
Database Version:	v52.457
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	444.70
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	404.67
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	0.442%
Registry Population: Scoped for This Run Only	7 (0.64%)
$ Estimated Value (12 Month Change):	-2.80% Analyzing 354 Sales
Research Note: Waltham factory serial lists designate this run as Grade No. 20 with 7 Jewels. However, #7640983 has been verified with top-plate screw-set jewels (including an odd raised jewel setting on the 3rd wheel), suggesting 11 or 15 jewels. #7640889 has also been reported with 15 Jewels and may also have this same configuration of 11 or 15 Jewels (no photo available for verification).

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Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
There are 7 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.

cbzimm Supporter 469 · May 19, 2022

Serial Number 7640983 was reported as inaccurate.

Note: 15J

Curator Response: Thanks for the report. This information has been noted in the research notes for this run.

ClockNut 2 · April 27, 2018

Serial Number 7640499 was reported as accurate.

Anonymous · April 27, 2018

Serial Number 7640889 was reported as inaccurate.

Note: Model 1888 has fifteen jewels not seven, page 121
in the complete guide to watches, my watch shows
at least 15 jewels.

Curator Response: Thanks for the report. Models are comprised of various grades and differing jewel counts. According to factory records, this run is designated as grade "No. 20" with 7 jewels. Feel free to upload a photo of the movement for further evaluation. (Another member just uploaded images of #7640499 from this run, confirmed as a 7 jewel movement).