Aquastar Benthos 500 'Jamaican Defence Force Issue' diamonds the Longines 13ZN--so-called because of

the Longines 13ZN--so-called because of its movement

While most notably used in the Speedmaster

I'll stop myself before I begin to ramble

and prices have begun to climb rapidly in the past few years

Considered on its own

Aquastar Benthos 500 'Jamaican Defence Force Issue' diamonds the Longines 13ZN--so-called because ofWe have a lot of affection for the horological "little guys" here at Analog Shift. Even when those "little guys" are downright monstrous lumps of steel. This Aquastar Benthos 500 is just such a monster. Built from the ground up as a no holds barred, extreme diver, it can't be considered a pretty watch by any means. But if you're being serious about your tool watch design, aesthetics are very much a secondary thought. (Consider the Omega PloProf 600,