First off, that is a Remington and not a Colt 1911.
I can't tell from the pics, but if it is all original then it would be worth around $2,000.
Handle it with care. Because it is in very good condition and every mark/scratch it receives the value goes down.
The frame is serial No 34604, marked 1911 and has a Rock Island Arsenal stamp on the frame. This slide is a Type 2 which was reportedly used on serial numbers 927000-1015000. The frame and slide are not from the same manufacture.
I can’t help establish a value for the gun, but considering the frame and slide are made by different manufacturers, it would guess the value is as a shooter grade.