Degen's rectilinear bellows apparatus no. 2

Rare, old rectilinear device No. 2 from Degen, from 1891, with bellows in perfect condition, with 3-part feet. A sliding part, a folding part and a 3rd part attached to the device. I specify that I do not know this kind of product at all. I try to describe it as much as possible.

Ref. : YJPJDZ4Q