A question. The frame with JMG certainly suggests 1917-18. I'm no expert, but as far as I know the slides on 1911s were unnumbered. I've been told that the slide numbering is encountered only on 1911A1s from about 800,000 to 1,300,000.
I offer this more as a question than a statement.
Frame right should also say United States Property, along with SN, although this might have been buffed off during refinishing. 1911s were blued.
On the left of the slide there should be a rampant colt. Is it behind the finger grooves, or in the center of the slide?
Whatever, $225 is a filne price for a working Colt.
JT