I have been trying to track one of these down for quite a while. The trouble has been that they were either in a poor state of repair, or the seller was simply asking for too much.
Aimed at the amateur photographer, it is simple to operate and uses 120 medium format film. Instead of the more common Single Lens Reflex (SLR), these are Twin Lens Reflex (TLR) cameras, which can take a bit of getting used to, but they are great fun to use.
In this video I explore my 166B in more detail.
