Pocket Watch Database
https://pocketwatchdatabase.com/search/result/rockford/4509
Access Date: June 26, 2022
"4509" could possibly indicate the grade of the watch and not the serial number of your movement. Serial numbers are usually more than a few digits.
From the American Horology Archive:

Rockford Watch Co.
Grade: 9 Jewels
Original data is missing for this range. Please report information about your watch movement, if known.
Manufacturer: | Rockford | ![]() |
Manufacturer Location: | Rockford, Illinois | ![]() |
Movement Serial Number: | 4509 | ![]() |
Grade: | 9 Jewels | ![]() |
Model: | 1 | ![]() |
Estimated Production Year: | 1877 | ![]() |
Size: | 18s | ![]() |
Jewels: | 9j | ![]() |
Movement Configuration: | Adaptable | ![]() |
Movement Finish: | Gilt | ![]() |
Movement Setting: | Transition | ![]() |
Plate: | Full Plate | ![]() |
Regulator: | Plain | ![]() |
Railroad Grade: | No | ![]() |
Data Research: |
1907 Rockford Serial List |
![]() |
Database Version: | v48.129 |
Help Us Help Others By Improving the Database:
Does this information describe your movement accurately?
Data Verification Reports
Bostonjoe Top Contributor 169 · January 29, 2022
Serial Number 4509 was reported as accurate.
Anonymous · July 9, 2021
Serial Number 4447 was reported as inaccurate.
movement, with this serial number, is engraved as
having 11 jewels, not nine.
Anonymous · December 24, 2020
Serial Number 4942 was reported as inaccurate.
Jewel, Extra. This should be from 1877, second
year of production.
Anonymous · May 2, 2020
Serial Number 4527 was reported as accurate.
wmike565 Supporter 106 · September 13, 2018
Serial Number 4254 was reported as inaccurate.
Picture is provided
beelzebud 6 · September 3, 2018
Serial Number 4810 was reported as inaccurate.
bridge
Anonymous · June 28, 2018
Serial Number 4527 was reported as inaccurate.
beelzebud 6 · June 18, 2018
Serial Number 4107 was reported as inaccurate.
Crown at 3pm
Anonymous · January 25, 2018
Serial Number 4058 was reported as inaccurate.
beelzebud 6 · January 19, 2018
Serial Number 4125 was reported as inaccurate.
Anonymous · September 26, 2017
Serial Number 4564 was reported as accurate.
Anonymous · October 24, 2016
Serial Number 4058 was reported as inaccurate.
Anonymous · January 9, 2016
Serial Number 4941 was reported as accurate.
Anonymous · February 27, 2014
Serial Number 4667 was reported as accurate.
tomc1234 30 · January 11, 2014
Serial Number 4268 was reported as accurate.
Anonymous · October 9, 2013
Serial Number 4263 was reported as inaccurate.
tomc1234 30 · September 3, 2013
Serial Number 4268 was reported as accurate.
Anonymous · April 26, 2013
Serial Number 4874 was reported as inaccurate.
Anonymous · April 26, 2013
Serial Number 4862 was reported as inaccurate.
Anonymous · April 26, 2013
Serial Number 4862 was reported as inaccurate.
Anonymous · March 7, 2013
Serial Number 4125 was reported as inaccurate.
private label: Thomas C Calvert
not RR grade

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