Vivitar 3900 Auto Thyristor Tested Working With Mount

Vivitar Auto Thyristor 283 Flash, PLUS wire connector, Tested Works

Vivitar 3900 Auto Thyristor Camera Flash Tested W/ Battery Insert AP-3

Vivitar 3900 Auto Thyristor Flash w/bracket, cable & block used good condition

Vivitar 3900 Auto Thyristor Camera Flash, No Batteries - Black

Vivitar 3900 Auto Thyristor Camera Flash, No Batteries- Black

Vintage Vivitar Auto Thyristor 550FD Flash Unit for [Nikon/Canon/Pentax Tested