Requires 4 AA batteries. Looks to be in nice conditions, just signs of use.
Vivitar Zoom Thyristor 285 Vari Power, Tested and Working - Please Read
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 2500 Flash SLR Camera Mount Vintage
Vivitar Zoom Thyristor 2500 Flash
Vivitar Zoom Thyristor 3500 Flash with Olympus Dedicated Module DM/O (Tested)
