Vivitar 283 Auto Thyristor Electronic Flash With Box Not Tested

Vivitar 283 Shoe Mount Flash for Universal ('Vintage') Auto Thyristor

Mendelsohn Speedgun Model E-4 flash gun

Vivitar 283 Auto Thyristor electronic flash unit

Vivitar Auto Thyristor 283 Flash / Flashgun / Speedlite With Sensor Adapter

Vivitar Automatic Electronic Flash 2000 Camera

VIVITAR Auto Thyristor 283 FLASH AUTO THYRISTOR Sensor Photo Flash Equipment

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