Put batteries in, didn't seem to get any joy. Appears visually all in good order and swivel works well.
Vintage Sunpak Auto zoom 2600 Electronic Flash Unit With Manual
VINTAGE SUNPAK AUTO ZOOM THYRISTOR FLASH UNIT MODEL: 3600 + FREE UK POSTAGE
Sunpak Auto Zoom 3600 Thyristor Flash UNTested Vintage photography Prop Display
Sunpak Auto Zoom 4000 Flash Gun Auto Zoom for Universal Film Camera
Vintage Sunpak Auto 24 Flash Gun
Vintage Sunpak Auto 17SR Hotshoe/PC Cord Flashgun - working.
