Nikonos II, 1968
A slight improved version from the original Nikonos 1. most significant is the direct flash connection underwater or used with an adapter out of water. Some interchangeable UW-Nikkor introduced during this era came with improved DOF scales. Some models sold in European market may still bear the name Calypso. The camera adopted the modular design of the early Nikon SLR type where you can removed the entire external shell from inside. But similar to the Nikonos 1, model II was still a meter less camera. This model was eventually discontinued in 1975.