Nikon Speedlight SB-15, Vivitar Zoom Thyristor 3500, Sunpak Auto 28 SR Thyristor
Vivitar Zoom Thyristor 3500 DM/C Flash for Canon/Olympus OM10 20 30 etc WORKING
Vivitar Zoom Thyristor 3500 Film Flash Gun with Manual Working
Vivitar Zoom Thyristor 3500 Flash with Olympus Dedicated Module DM/O (Tested)
Vivitar Zoom Thyristor 2500 Flash SLR Camera For OM10 20 30 4ti etc WORKING
Vivitar Zoom Thyristor 2500 Flash SLR Camera Mount Vintage
