This Colt M1911A1 was shipped on May 24th, 1943 to the Transportation Officer at Springfield Armory. It was on Colt Factory Order # 2285 as part of a 800 gun shipment.
This Colt was part of a batch of 1515 lend lease pistols sent to Canada where it was marked with the C broad arrow on the rear of the slide and on the frame below the G.H.D. inspectors mark. After use in Canada it would be returned to England where the normal British proofs were applied in the 1950's before the pistol would returned back to the US.
This pistol also has the rare commercial military slide cut for the Swartz Safety. They have been observed in the 930,000-935,000 serial number range. It's also marked with the London Proof House marks which were Post 1955.
The inspector stamp of G.H.D. for Brigadier General Guy H. Drewry. B.G. Guy Drewry was the Army Inspector of Ordnance at the Springfield Ordnance District from June 17th, 1942 to July 15th 1945.