A perpetual calendar you can set backwards.

A perpetual calendar knows the length of every month, leap years included, and until Ulysse Nardin’s 1996 movement it was a one-way machine: the levers that advance it cannot be run in reverse, so setting it means going forwards through the dates and, if you pass the right one, going round again. Ludwig Oechslin, the astronomer-watchmaker who did Ulysse Nardin’s astronomical trilogy, replaced the levers with gears, and a gear can turn either way. On this watch you set the whole calendar from the crown, forwards or backwards.

The GMT version puts a second time zone in the window at six and two pushers on the left of the case: one jumps the main hour hand forward an hour, the other back, so you change local time on landing without touching the minutes or the calendar.

The title gives the reference, 326-60/62, the size and the metal. The Amazon rows say the dial is white; the photograph shows the black wave dial that this reference number denotes, so read the photograph. The rows also do not give water resistance or reserve; Ulysse Nardin lists the 326 case at 100 metres and the UN-32 at about 42 hours.

Whether the watch is new with Ulysse Nardin’s warranty or a dealer-serviced piece is not stated in the rows we read; ask, and ask for the box and papers. Every figure here comes from the listing and from Ulysse Nardin’s published description, not from handling the watch.

This is a regular Amazon listing from an independent dealer, Luxor Watches on the day we read it, with Amazon’s 30-day return window; it is not a Luxury Stores pre-owned unit. The second button opens the live search for GMT Perpetuals in case this one has sold.

Ulysse Nardin perpetuals have resold for well under new and close to what pre-owned buyers paid, sometimes more, sometimes less; that is a pattern, not a promise, and nothing here is investment advice.