Model: 550FD Auto Thyristor. Compatibility Canon Ricoh.
Vintage Vivitar 3500 Zoom Thyristor Flash Kit for Canon Boxed with DM/C Module
Vintage Vivitar 283 Auto Thyristor with Case, Cable & Instructions
Vintage Vivitar 200pz Camera Auto Focus + Booklet
Vintage Vivitar 2800 Auto Thyristor… Not tested.
Vintage Boxed Boots Photoflash Auto 2400 Auto/Manual Electronic Flash Unit
Vivitar Auto Thyristor 255 Shoe Mount Flash vintage film camera flash unit
