Vivitar 2000 Automatic Electronic Flash
For hotshoe or PC cord ('X' synchronisation)
Guide number (ISO 100) 60 ISO/ft 18 DIN/m
Power source 4 x AA batteries
Auto exposure range (ISO 100 film): f/4: 3.5 - 15 ft (1- 4.5 m)
Can also be used in manual mode
With instructions.
I tested this some months ago (by pressing the 'test' button only) and it flashed.
Vivitar 2000 Automatic Electronic Flash (Malvern Link WR14)
This offer has been gifted to someone and is no longer available.