Quote Originally Posted by Newt_on_Swings View Post
Oly RC. Smallest full manual rangefinder with aperture priority that can run without batteries if needed.
No - the 35RC is shutter priority. These compacts that have mechanically-governed shutters use trapped-needle AE systems that control how far the aperture is stopped down.

There is a small number of cameras of that vintage with electronically-controlled shutters that have aperture-priority AE - look among the Yashica models.