what you have there is a late 1950's "close-up kit" for Leica. This kit originally sold with a Visoflex I, double cable release, Bellows I (there were two bellows extensions), PEGOO magnifier, KGOON ball head, a 9cm extension tube, and a Leica M3. The case was called UYOOQ. A complete kit is rare. The reflex housing was vastly improved in subsequent years and doesn't command a decent price maybe $50-$75 with magnifier, the bellows if both halves are present may fetch $100, ball head about $70, double cable release, $30. The empty case about $70. The M3 if present about $700 if in excellent condition.