Oh, how I miss my Spotmatics. While sorting and cataloging decades of negs, I run into many self portraits with cameras. They are more like dual portraits for I must have at least one self- portrait with nearly every camera I used.
The attached pic only shows a chink of the name, but the legend on the front of the prism reads Honeywell Pentax. (N.B. image not reversed) Others on six frame strip show both words, but I prefer this shot. None show the other ID nomenclature: SP500 or SP1000, on the top of the face plate, because my long fingers conceal it.
BTW, the old draw of nostalgia for once owned cameras is gnawing at me, again. Please see details of my plea for a swap of a Spotmatic for one of my cameras in For Sale / For Trade / For Free / Wanted forum.

Pentax Spotmatic, (small detail of frame) Film unmarked, probably Freestyle 400, taken in 1970s