Here is a Pentax K mount bellows system for use in slide duplication. The Auto Bellows K extends from 38mm to 170mm, with a measuring scale that shows you how far the bellows have been extended. The tripod mount is movable and the body features a double cable release.
This bellows system is in good condition. It is light tight and all mechanical actions are smooth. The tripod mount and all locking mechanisms are secure.