Panda dial, solar heart, reference unconfirmed.

Orient’s solar chronographs run on the Epson-made VS752 caliber, a quartz chronograph fed by a light-charged cell. Orient states roughly six months of running from a full charge in darkness, and no battery to replace. Wear it in daylight and the maintenance is done.

That is the appeal over a mechanical chronograph, which needs winding and periodic servicing, and over an ordinary quartz chronograph, whose stopwatch is a real drain on a disposable cell. Here the dial has the registers and the date; the wrist does the charging.

Someone who wants a chronograph in a dive-watch shape without ever thinking about a battery, and who is happy to confirm the exact reference on the listing before ordering. The family traits are consistent: a sapphire crystal, a steel bracelet with a fold-over clasp, luminous hands and markers, and the VS752 inside.

If you want the Orient diver without the stopwatch, the Kamasu and Mako 40 on this site are the mechanical routes with fully documented references. Nothing here has been measured or handled by us.