Rockford Pocket Watch: Serial Number 670405 (Grade 545)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/rockford/670405/link

Access Date: December 20, 2024

From the American Horology Archive:

Rockford Watch Co.

Grade: 545

Production Information Missing From Factory Records. See Research Notes.

Manufacturer:	Rockford
Manufacturer Location:	Rockford, Illinois
Movement Serial Number:	670405
Grade:	545
Model:	5
Estimated Production Year:	1906
Run Quantity:	900
Grade/Model Run:	6 of 9
Grade/Model Total Production:	5,500
Size:	16s
Jewels:	21j
Movement Configuration:	Openface
Movement Finish:	Nickel
Movement Setting:	Lever
Plate:	Bridge Plate
Double Roller:	Yes
Center Wheel Material:	Gold
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
Railroad Grade Classification:	Class A
Case:	Various
Run ID:	978.545G6.16S218.165M27.O357.L734.21J92
Data Research:	1907 Rockford Serial List
Database Version:	v52.516
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	16.56
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	169.25
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	0.857%
Registry Population: Scoped for This Run Only	6 (0.67%)
Research Note: #670379: Verified as Marked "540" and is Pendant-Set. #670405: Verified as Marked "545." #670432: Reported as Marked "545."

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Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
There are 6 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.

Anonymous · December 11, 2024

Serial Number 670267 was reported as inaccurate.

Note: This one is marked Rockford Watch Co. 21 jewels
adjusted 5 positions double roller, and marked
Pocahontas and is hunter and pendant set.

ChrisG Top Contributor Supporter 605 · January 14, 2024

Serial Number 670148 was reported as inaccurate.

Note: Image - 266598873315

funkywatches 69 · November 15, 2021

Serial Number 670204 was reported as accurate.

Anonymous · October 27, 2020

Serial Number 670432 was reported as inaccurate.

Note: This one is also marked 545 adjusted 5 positions
21 jewels Rockford Watch Co. Double Roller and is
(pendant set)
Not Railroad Grade.

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

jason4kstate 271 · August 3, 2020

Serial Number 670196 was reported as accurate.

Anonymous · June 24, 2020

Serial Number 670451 was reported as inaccurate.

Note: The movement associated with this serial number is
stem set, instead of lever set. All other
information is correct.

Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.

okiejohn 395 · January 26, 2019

Serial Number 670379 was reported as inaccurate.

Note: This movement is clearly marked as a Grade 540,
despite the SN being outside of the range for this
Grade (see photo). It is also a stem set instead
of a lever set the database says it should be for
a Grade 540.