I just picked up a Gundlach 5x7 Rapid Symmetrical W.A. lens, roughly
8" f.l. (don't have it in my hands yet).
The Rapid/Symmetrical names sound like a Rapid Rectilinear type, then
I read that Gundlach had an extra element modification to the RR to

I thought we were crazy for carrying these heavy old cameras around!
Someone left the gate open: Certainty 100%

On the MPP MicroPress 4x5 camera there is a FRONT <-> BACK switch. It seems
to be locked in the FRONT position but the FP shutter works fine
in this position and I am not able to move the switch to the BACK position.
Anybody knows the secret behind this switch?