Pocket Watch Database

We noticed that you entered a relatively short serial number.
"auth" 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:
Illinois Grade A. Lincoln Pocket Watch

Illinois Watch Co.

Grade: A. Lincoln

Manufacturer: Illinois
Manufacturer Location: Springfield, Illinois
Movement Serial Number: Unserialized
Grade: A. Lincoln
Model: 6
Estimated Production Year: 1869
Size: 18s
Jewels: 21j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: Yes
Case: Various
Database Version: v52.334
$ Estimated Value (12 Month Change): 0% Analyzing 118 Sales

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Illinois Grade A. Lincoln Pocket Watch