Rockford Pocket Watch: Serial Number 439543 (Grade 80)

Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/rockford/439543

Access Date: April 20, 2024

From the American Horology Archive:

Rockford Watch Co.

Grade: 80

Production Inconsistent with Factory Records. See Research Notes.

Manufacturer:	Rockford
Manufacturer Location:	Rockford, Illinois
Movement Serial Number:	439543
Grade:	80
Variation:	21 Jewels
Model:	8
Estimated Production Year:	1894
Run Quantity:	25
Grade/Model Run:	4 of 5
Grade/Model Total Production:	250
Variant Est. Production:	25 (18S-M8-21J)
Size:	18s
Jewels:	21j
Jewel Material:	Ruby
Jewel Setting:	Gold Settings (Screw-Set)
Movement Configuration:	Hunting
Movement Finish:	Two-Tone
Movement Inlay Color:	Gilt
Movement Setting:	Lever
Plate:	Full Plate
Regulator:	Micrometric
Hairspring:	Breguet
Escapement Type:	Straight-line
Adjusted:	Yes
Adjusted to Position:	Yes
Adjusted to Temperature:	Yes
Adjusted to Isochronism:	Yes
Movement Markings:	R.W.Co. Rockford, Ill. 21 Jewels Adjusted
Data Research:	1907 Rockford Serial List
Case:	Various
Run ID:	502.80G4.18S435.188M132.H277.L365.21J1
Database Version:	v52.235
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	0.75
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	7.66
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	0.039%
Registry Population:	2 (8.00%)
Research Note: Rockford Serial Lists designate this run [439501-439550] as Grade 80 with 17 Jewels. However, it appears as though the second half of this run was upgraded to 21 Jewels. #439520: Verified as Marked "17 J." #439528 and #439543: Verified as Marked "21 Jewels." This run has been split in the database to account for the variations.

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Production Metrics Tree: Grade 80

Target Profile: 18S-M8-21J-HTL-APTI-21 JEWELS

Rockford Grade 80 (All Variations): 250 ETP
18S: 250 100.00% 18s, Grade 80
18S-M8: 250 100.00% 18s, Grade 80, Model 8
18S-M8-21J: 25 10.00% 18s, Grade 80, Model 8, 21 Jewels	Other: 225 Other Jewels or Unclassified
18S-M8-21J-HTL: 25 10.00% 18s, Grade 80, Model 8, 21 Jewels, Hunting/Lever/Two-Tone
18S-M8-21J-HTL-APTI: 25 10.00%
18S-M8-21J-HTL-APTI-21 JEWELS: 25 10.00%

Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
There are 2 watches in the population registry for this run with 1 image. 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.