Here's a 1960s Rotary Aquaplunge chono diver in jet black. Think Aquastar Deepstar.
Check out the segmented hands, the slashing markers, the diamond-dipped seconds hand and the intricate subdials.
The solid stainless case is a wearable 37mm across, excluding the unsigned crown, by an immense 48mm from lug to lug. Big, sharp-edged, original polish. Fantastic.
Under the hood is a 25-jewel manual movement keeping excellent time.
Chrono functions working fine.
Diver cred? This one has it.