Bought mine in Vietnam, 1971 while on a temporary duty assignment. Still haul it out form time to time, it is a wonderful, small unit. If you can find a Vivitar 200 flash, which uses a 9v battery, it is a real sweet setup. The Vivitar 200 recycles almost instantaneously, and is good on auto to about 15'-20'. Or find any cheap manual flash and use the GN setup - really slick idea in its day.
Roger Christian "Those who know what they are doing shoot film. Those who don't shoot digital"