An excellent camera. I have one. Top shutter speed of 1/1000 on a leaf shutter is quite remarkable. The shutter is made by Citizen in Japan and the lens is a Rokkor. Down side is that exposure can only be set using EV settings and perhaps that long wind stroke ( I have big hands and it doesn't bother me).
That fast shutter speed is achieved by the shutter only opening to the extent of the iris diaphragm - at 1/1000 shutter speed, the aperture is quite small.