HTD Hesagraph RitmoCorsa

HTD sold all 99 examples of the Hesagraph RitmoCorsa for $2,350, or $2,351 each, before most people outside the hobby had heard of it. The watch marks five years of HTD's tie to the Scuderia HTD RitmoCorsa team, and the number is the whole story here: a limited run priced like a serious chronograph that sold out on the strength of one dial.

That dial is enameled, not painted, which matters because enamel holds a depth and a true red that printed lacquer cannot match over time. It carries three recessed white sub-dials for a 30-minute counter, a 12-hour totalizer and running seconds, plus applied faceted indexes and Super-LumiNova pips. The case is 39 mm wide, 48 mm lug to lug, and 12.4 mm thick including a box-type sapphire crystal, finished entirely in polish, which is a vintage choice most modern tool watches avoid because polish shows scratches.

The movement is the Sellita SW510 M, a hand-wound chronograph caliber running at 28,800 vph with 23 jewels and a 63-hour power reserve. Hand-winding is why the case stays this thin; an automatic chronograph movement with a rotor would have forced more height. Water resistance is a modest 50 meters, which tells you this is a watch for a wrist, not a wetsuit.

The three-row steel bracelet is brushed against the polished case, with a push-button folding clasp that uses old-style micro-adjustment holes rather than a tool-free system, and no quick-release spring bars at the lugs. Both are small frictions on an otherwise considered object, and both mean a spring-bar tool lives in your watch box if you want to swap to a strap.