This camera came to the top of the heap today and it feels neglected so I felt like I might let it out into the sun,' if it don't rain that is'.

All it has on it for setting shutter is EV # from 10 to 15.
The chart on it's back is for Kodachrome Day Type Film. I have no idea what the ASA is for that film.
The slowest that I have is ASA 200. So any suggestions on what EV # I should use?
RonB