Here's the first iteration of the first ZRC diver. The series 1 first series. The difference here is the crown: it's a non-screwdown at the 3 position.
The case is 35mm in diameter with that cool dotted lume berzel.
This is so rare that it's hard to even evaluate.
The glossy black dial has started to turn to chocolate. The paddle hands have turned pumpkin.
What a magnificent watch.