That is a Kongsberg Colt Model 1914. These were made in Norway at the Kongsberg Armory. Couple of identifying points- each part has a serial number. The slide release has a little dogleg to it. Caliber marking is metric (still 45 ACP)
An ORIGINAL 1914 is in the the $3,000-$5,000 range. The upper end is for a very few that have the Nazi Waffenampt marking, after the Nazis took Norway.
However, yours APPEARS to have been refinished in nickel plate. Originals were, to the best of my knowledge,parkerized or blued. Grips and grip screws have been changed. Original magazine had a lanyard loop on the mag as well as one on the pistol.
Changes tear the hell out of collectors value, so POSSIBLY 1/3 to 1/4 of the high end collector's value. But they are scarce enough that you will REALLY need a hands on appraisal from someone that knows these guns.
What we have here is... failure- to communicate.