Pocket Watch Database
Access Date: June 28, 2022
"1106" 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 Watch Co.
|Manufacturer Location:||Springfield, Illinois|
|Movement Serial Number:||1106|
|Estimated Production Date:||June 1872 - January 1873|
|Dial Feet Locations:||16.5, 36.5, 53.0|
|Case Screw Locations:||O-36.5, H-51.5|
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Data Verification Reports
Dave895 Supporter 60 · December 16, 2019
Serial Number 1106 was reported as accurate.
pmwas1 96 · October 27, 2013
Serial Number 1323 was reported as accurate.