Bolt holes from center to center is 3&11/16".
the Fronts face is round and measures 3&3/16". Width of body is 1/2". 45 degree lever hole. There is a V on side of mortise lock. Turing lever is 3/4" long.
Paul from SWISCO responded:
October 6, 2016
Please see our 82-218 mortise lock. I believe this will be a good match.