Posted by Les on January 28, 2001 at 16:33:38:
In Reply to: Unknown Graflex Item, what is it posted by Carl Vogt on January 28, 2001 at 13:41:26:
I think you're right on all accounts, in the engineering term is a photo tube. I have a couple of different versions of old flash slaves made by Heiland and both need batteries to operate (those odd 4.5 & a 22.5 v)