I just purchase a It is a Busch Pressman Model C and it has a Graflex Optar 101mm 1:4.5 lens, and a Kalart Synchronized Range Finder Icame with a flash cable but no film holders if any one has some that can be spared I will be interested also I found a link that shows how to adapt a roll back to the spring back the link is
http://members.lycos.co.uk/jolommencam/Busch/page3.html