Thanks for the info on my flea market find. I'm of an age where Googling it slips my mind as a first option but I did that and found a wealth of info. Seem like the inscription on the bottom plate really was the shutter. Now I need to find a modern equivalent to the RM640, A640 or HM-N battery which was mercury. Thanks again. JB ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.