1912 Reference. The Flexo-Front gets its name from the sliding wooden tambour panel that could shift the lens/shutter to four different positions. The feature is called a "flexible traveling front."

The camera shown in the reference illustrates the standard portrait lens mounted in a Winner shutter.

However, the Flexo-Front presented on this website has what appears to be a landscape lens with a front mounted Wollensak Skyshade shutter.