We bet you’ve never seen one of these before.

And you wouldn’t be alone! What you’re looking at is an extremely rare, tantalum-and-gold chronograph from none other than Audemars Piguet, one of Swiss watchmaking’s “Holy Trinity.” The “Huitieme” Chronograph, as it’s called, was part of a prestigious collection of complicated watches that existed in the 1970s and 1980s. Distinctly “of its time” when viewed today, it’s a watch that nevertheless represented the pinnacle of cutting-edge industrial design upon its introduction.

This particular Huitieme Chronograph features a 40mm tantalum case, a mineral crystal with built-in inverted date magnifier, an unsigned crown, a signed, stepped bezel, a grey tantalum dial with triple-register chronograph layout, an outer tachymeter dial, a date window, gold stick hands, and a Analog/Shift Denham strap with stainless steel pin buckle. It’s powered by the Audemars Piguet Calibre 2121, which is itself based upon an ébauche from Jaeger-LeCoultre with a Dubois Dépraz chronograph module sitting on top. (At the time of the watch’s production, AP owned 40% of struggling JLC.)

If you’re a fan of complicated watchmaking but are tired of the same ol,’ same ol,’ this funky chrono from AP should be in your cart!