For sale is a highly sought after Hamilton manual wind chronograph from the 1960s. This model features an unpolished case, all original parts aside from an aftermarket strap, and a dial with striking patina on the outer edges. Asking $2250 shipped or best offer Partial exerpt from Hodinkee on this model: The sport of racing was wildly popular in the decade of the '60s, and as a result, chronographs became an increasingly prevalent style. Here, we see a striking example from Hamilton of just such a design and layout. Collectors would refer to this black dial with white registers as a reverse panda. In this example, we have a beautiful chronograph featuring a horizontal, two-register layout with a black dial and white subdials at three and nine o'clock. Many Hamilton chronographs, like the ref. 7723, were actually made by Heuer and then branded with the Hamilton name on the dial as well as the case and movement. At the time, Heuer had a reputation for making watches for other brands and occasionally even retailers. Chronographs like this Hamilton 'Reverse Panda' were remarkably similar to the ever-popular Heuer Carrera but served to attract many newer and younger buyers because of the relatively more attainable price point. The ref. 7723 features a classic, modestly sized stainless steel case design. Aside from the chronograph, the dial design is quite minimalistic, with a clean, easy-to-read layout. It showcases matchstick-style hour and minute hands as well as applied stainless steel hour markers. Maker: Hamilton Model: Chronograph Reference: 7723 Year: 1960s Case No: 182249 Material: Stainless steel Dimensions: 36mm diameter; 12mm thickness Crystal: Plexiglass Lume: Yes, Tritium Caliber: Valjoux, manual-wound, caliber 7730 (Hamilton, caliber 643) Bracelet/Strap: Black genuine leather strap with red stitching Lug Width: 19mm Box/Papers: No