I have a 1911 Pin gun with two sets of new barrels labeled Chickopee Falls, converted to ejectors, re case colored, new wood. I'm pretty sure it started life as a non ejector gun. The price list showed case colors costing I think $10.00 and the ejector conversion at at under $100. Done in the 50s The gun is mint condition after the refurbish.

I also had a gun just like yours with a Philly reciever and Savage era barrels. I have one now with a set of Savage era barrels numbered to the gun and a set of cut Philly barrels as well. Owner blew the muzzle and cut the old barrels.