Rockford Pocket Watch: Serial Number 517206 (Grade 910)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/rockford/517206

Access Date: November 28, 2024

From the American Horology Archive:

Rockford Watch Co.

Grade: 910

Mixed Run: Transitional Model 7/9 and True Model 9 Movements

Manufacturer:	Rockford
Manufacturer Location:	Rockford, Illinois
Movement Serial Number:	517206
Grade:	910
Model:	9
Estimated Production Year:	1898
Run Quantity:	2,100
Grade/Model Run:	1 of 7
Grade/Model Total Production:	5,200
Size:	18s
Jewels:	21j
Jewel Material:	Ruby & Sapphire
Jewel Setting:	Screw-Set
Movement Configuration:	Openface
Movement Finish:	Nickel
Movement Inlay Color:	Gilt
Movement Setting:	Lever
Plate:	Full Plate
Train:	Quick
Regulator:	Micrometric
Hairspring:	Breguet
Escapement Type:	Straight-line
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
Case:	Various
Run ID:	612.910G4.18S545.189M26.O158.L474.21J9
Data Research:	1907 Rockford Serial List
Database Version:	v52.469
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	15.65
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	160.02
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	0.810%
Registry Population: Scoped for This Run Only	37 (1.76%)
Research Note: Rockford Serial Lists designate this run as Model 9. However, movements from this run have been recorded as featuring traits consistent with the Model 7/9 transitional hybrid. It is safe to conclude that serial number 512,501-518,000 were transitional, serial numbers after 519,001 were true Model 9, and serial numbers 518,001-519,000 are mixed, with earlier movements more likely to be classified as transitional.

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Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
There are 37 watches in the population registry for this run with 6 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.

Anonymous · September 28, 2021

Serial Number 517855 was reported as accurate.

Anonymous · September 24, 2021

Serial Number 517855 was reported as accurate.

Anonymous · April 19, 2021

Serial Number 517739 was reported as accurate.

Anonymous · July 10, 2020

Serial Number 518813 was reported as accurate.

Anonymous · March 23, 2020

Serial Number 518820 was reported as accurate.

Anonymous · February 22, 2020

Serial Number 517444 was reported as accurate.

Anonymous · October 7, 2019

Serial Number 517626 was reported as accurate.

Anonymous · July 23, 2019

Serial Number 518652 was reported as accurate.

Anonymous · November 27, 2018

Serial Number 517358 was reported as accurate.

Anonymous · October 29, 2018

Serial Number 519008 was reported as accurate.

Anonymous · August 2, 2018

Serial Number 517936 was reported as accurate.

Anonymous · June 26, 2018

Serial Number 518872 was reported as accurate.

wmike565 Supporter 115 · May 12, 2018

Serial Number 518287 was reported as accurate.

Anonymous · April 17, 2018

Serial Number 518935 was reported as accurate.

Anonymous · March 21, 2018

Serial Number 519254 was reported as accurate.

Anonymous · March 10, 2018

Serial Number 517731 was reported as accurate.

oilseed Supporter 471 · January 18, 2018

Serial Number 519245 was reported as inaccurate.

Note: being close to the end of the serial number block
(you show 519300 as the last one), the transition
may have been sooner. this watch is a grade 900
(24 jewel) not the 21 Jewel grade 910. see item
# 332523839359 (grade 900 movements started at
the next Serial Number block). or maybe this was
an anomaly?

Curator Response: Thanks for the report. After evaluating photos of the movement, I verified the serial number is 519345, which correctly corresponds to a Rockford Grade 900.

Anonymous · September 30, 2017

Serial Number 518739 was reported as accurate.

Anonymous · August 24, 2017

Serial Number 517744 was reported as accurate.

Kevin H 84 · July 3, 2017

Serial Number 518092 was reported as accurate.

Anonymous · June 23, 2017

Serial Number 517503 was reported as accurate.

Anonymous · November 30, 2016

Serial Number 518188 was reported as accurate.

cmdraven 4083 · August 26, 2016

Serial Number 517241 was reported as accurate.

Anonymous · August 4, 2016

Serial Number 518931 was reported as accurate.

jarkos 1 · March 26, 2016

Serial Number 519125 was reported as accurate.

Gasperoff Supporter 727 · February 22, 2016

Serial Number 517410 was reported as accurate.

Gasperoff Supporter 727 · February 22, 2016

Serial Number 517410 was reported as accurate.

Anonymous · August 27, 2015

Serial Number 518039 was reported as inaccurate.

Note: Hunting Case movement

Anonymous · February 5, 2015

Serial Number 519022 was reported as accurate.

Anonymous · December 8, 2014

Serial Number 519186 was reported as accurate.

Anonymous · October 5, 2014

Serial Number 517986 was reported as accurate.