Archived posting to the Leica Users Group, 2000/02/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The old mercury RM640's are no longer made by anyone to my knowledge. Check Radio Shack for an alkaline equiv. in size. (PX1 may be another number, I think they were the same size) The voltage will not be the same, nor the discharge curve so you will get inaccurate meter readings, particularly towards the end of it's life. I suspect this may be OK for your purpose. There are so many selenium cell meter cameras from this vintage, I just stick to them. Bruce Bowman Killingworth, CT.