Up for sale is a classic vintage Vivitar 550FD Auto Thyristor Shoe Mount Electronic Camera Flash. This is the highly sought-after M/P/O version, specifically dedicated for use with vintage Minolta, Pentax, and Olympus 35mm SLR film cameras (perfect match for systems like the Pentax ME Super, Olympus OM-10, OM-1, Minolta X-300, etc.). Features a bounce-flash swivel head, auto thyristor circuitry for battery saving, and a clean hot-shoe interface. Condition: Cosmetically in fantastic, clean vintage condition. Battery compartment is clean with no corrosion. Comes complete in its original retro retail box along with the original printed Vivitar user manual/guide.