Yes, it could be, likely was I think. At any rate it was/is a police Luger having the sear safety, but mis-matched along the way, some where, some time.
I'll give you a few hundred for it!
Joking aside on the value, really no way to tell,
just price it and put it here on the trader or describe and picture well and go with an auction. Since it will likely be a "shooter" for someone, include bore condition and if you have fired it or not.
Could bring $500 or $1500, no way to tell on an auction, JMHO.
More pictures, lightened please, would help determine what it is.
Be sure to include all markings.