Thanks! Except for the safety, it really looks like a WWII or earlier tanker’s sidearm. The shorter barrel, duck tail, hammer, wear and tear, grips, all that.

https://www.gunsinternational.com/guns-for-sale-online/pistols/colt-pistols---1911-pre-45/1943-colt-m1911a1--45-acp---1911-wwii-tanker-rig---battle-worn-us-property-gi-bring-back.cfm?gun_id=102417270

Just noticed, no grip safety, thought the backstrap looked odd.