Appeared in 1964 on the international market, the Topcon UNI a small lens shutter SRL with TTL light meter. It stead for about 5 years in production. The Sheikosha SLV shutter had 3 rings, one for setting the shutter speed (8/500 for automatic exposure in red, 4-1 and B for manuel for speeds with manuel exposure). second ring was the film speeds cale, the third the diaphragm ring with the Auto indicator.
2 Versions appeared, after various modification in 1967 a new series coded 54AL was taken into production.