I hope that I am doing this correctly to ask a question, as I am new to this and apparently went to the wrong area before to post - sorry if I created a problem doing that. That being said, I recently acquired a 44" long wooden propeller with worn decals that read Chicago Propellers, Wm H Gardner & Sons, Forest Park, Ill. It has a six bolt, 3" diameter hub with a 1" diameter hole and shows a stamped serial number of 1519-1. I saw some posts about Gardner Propellers and was wondering if Chicago Propellers would have been an offshoot of it? I assume that by the small size that it was used in a drone, but any information on the approximate age, rarity or how to find out more about it would be greatly appreciated. Thank you!