Waltham Pocket Watch: Serial Number 438465 (Grade P.S. Bartlett)

Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/waltham/438465

Access Date: February 03, 2023

From the American Horology Archive:

American Waltham Watch Co.

Grade: P.S. Bartlett

Manufacturer:	Waltham
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	438465
Grade:	P.S. Bartlett
Model:	1857
Estimated Production Date:	March 1870 - May 1, 1870
Run Quantity:	1,400
Grade/Model Total Production:	293,259
Size:	18s
Jewels:	11j
Movement Configuration:	Adaptable
Movement Finish:	Gilt
Movement Setting:	Key
Plate:	Full Plate
Adjusted:	No
Railroad Grade:	No
Data Research:	c.1900 Waltham Factory Ledgers 1954 Waltham "Gray Book" List
Case:	Various
Registry Population:	21 (1.50%)
Database Version:	v49.752

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Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
1		438244	#44	Marketplace	March 02, 2014
2		438282	#82	Marketplace	February 05, 2016
3		438323	#123	Marketplace	March 29, 2021
4		438365	#165	Marketplace	September 20, 2015
5		438433	#233	Marketplace	May 30, 2013
6		438435	#235	Marketplace	June 01, 2022
7	Image Credit: Scuba75	438465	#265	Collection	January 04, 2022
8		438518	#318	Collection	May 27, 2017
9		438984	#784	Marketplace	July 14, 2019
10		438986	#786	Marketplace	October 28, 2016
11		438998	#798	Inferred
12		439002	#802	Marketplace	April 24, 2018
13	Image Credit: Bostonjoe	439017	#817	Collection	October 24, 2021
14		439144	#944	Inferred
15		439218	#1018	Marketplace	April 21, 2013
16		439235	#1035	Marketplace	January 20, 2014
17		439379	#1179	Collection	February 07, 2014
18		439401	#1201	Marketplace	January 02, 2021
19		439450	#1250	Inferred
20		439567	#1367	Marketplace	May 20, 2018
21		439591	#1391	Inferred
Standard Deviation of Known Examples: 459.69 (Expected: 404.29, Δ55.40/3.96%)

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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.

cmdraven 3545 · May 30, 2022

Serial Number 438435 was reported as accurate.

Anonymous · January 4, 2022

Serial Number 438465 was reported as inaccurate.

Note: W.M Ellery

Curator Response: Thanks for the report. Unfortunately, the images uploaded are not clear enough to verify the serial number. Additionally, the barrel bridge is a slightly different color than the rest of the movement, so it is possible that the bridge was swapped at some point. #439017 from this run has been verified as P.S. Bartlett, as the factory records suggest.