Here's a vintage 1970s Nivada Grenchen diver chrono in minty condition.
Check out the minty charcoal black dial, with the cool orange-accented subdials...and that amazing orange seconds hand.
This beast is solid stainless steel, 44mm across, excluding the unsigned crown...by a massive 46mm from lug to lug. The black bezel clicks with each turn and is in excellent condition. Crystal is clear and gorgeous.
The Valjoux 23 manual movement keeps excellent time. Comes on a Tropic strap.
You want a vintage chrono that everyone else DOESN'T have? Here it is.