Visoflex Prototype Reflex Housings (Lot)

collection of 5 prototypes in almost mint condition, (1) grey hammertone IFLEX no.38160 with both screens, PEGOO prism finder (reversed engraving) and finder hood, M-mount, made for Reprovit or scientific use (probably for Leica MD in matching grey hammertone finish), (2) ENDO-Visoflex II prototype with M39 screw mount, interchangeable screen, flash contact and accessory holder on left side, shutter release arm for M models, (3) Visoflex II prototype with M-mount, foldable 90° prism finder, instant returning mirror, aperture pre-selection, different lens mount (for use with special 2.8/50mm prototype B288), illustrated in Wilhelm Albert 'Geburtstage der Leitz-Foto-Konstruktionen ab 1927' p.213 (lenses on p.221), (4) Visoflex II prototype with M-mount, foldable 45° prism finder, coupled self-spanning M3 lever, illustrated in Wilhelm Albert 'Geburtstage der Leitz-Foto-Konstruktionen ab 1927' p.213, (5) original grey hammertone Visoflex III with matching prism for grey MD, 6 o'clock cut-out on flange (purpose unknown), see 'Lager Vol.I' p.221 and 'Lager Vol.II' p.176 , Wilhelm Albert 'Geburtstage der Leitz-Foto-Konstruktionen ab 1927' p.220 (5)