Here's one of the rarest Wylers ever made: a 1960s 660 chronograph diver with the vaunted Valjoux 23 manual winding movement.
Check out the red-black-and-gray dial, in minty condition, with the huge arrow hour hand and red seconds hand.
This solid steel beast is a burly 40mm wide, excluding the signed crown, by 48mm from lug to massive lug. The case is unpolished, with sharp bevels and some dings and scratches.
The Valjoux 23 works perfectly, as do the chrono functions.