Zenith 03.3402.3610/53.C917

Design and case

Blue dials are where originality matters most on a watch, so check the photos for even colour, crisp printing, and lume that has aged at the same rate as the hands. The numeral style, "No numerals", sets how formal the dial looks and how quickly the time can be read at a glance. Steel bezels take the first knocks on any watch, so look for dents, chips, and rubbing along the edge, and on a rotating bezel check that it turns cleanly and the insert has not faded.

Steel cases differ in weight and in how they carry scratches and polishing marks, so compare the case photos with the condition grade below.

Steel cases show their history in two places: the surface and the edges. Rounded lugs and blurred bevels suggest the case has been polished more than once, so compare the case photos with the condition grade below.

Leather wears in its own way: metal bracelets stretch and open small gaps between links, while straps show age at the holes and edges, so read the photos of the strap or bracelet with that in mind. The closure is listed as "Fold clasp, hidden", and it is one of the first parts of a bracelet to show wear, so it deserves a close look in the photos.

The watch is filed under "Men's watch/Unisex", which indicates intended size and styling more than who may wear it.

Movement and technical details

Automatic movements ask for different upkeep: mechanical ones typically need a service every five to ten years, while quartz ones need a battery change and an occasional gasket check.

With 60 h of power reserve, the watch runs for that long once fully wound, which matters most if you rotate between several watches.

A frequency of 36000 A/h defines how finely the movement divides each second: higher beat rates give a smoother sweep of the seconds hand, while lower ones tend to extend the power reserve.

It dates from Unknown, and the year matters because dials, hands, lume and bracelets often changed within a single reference.

Condition and set

Any wear is visible in the photos, and we describe it as plainly as we can. Used (Good) is the grade we assign after inspecting the case, dial, bezel, crystal, and bracelet, and the photos show the wear behind that grade. The set is described as "Original box, original papers". Box and papers document provenance, and a watch with a full set is usually easier to resell.

The reference number 03.3402.3610/53.C917 separates this version from other variants of the model, down to dial, bezel and bracelet details, so match it against the photos before you buy.

Authenticity and service

Every watch sold by WATCHOYSTER is inspected and authenticated by our certified watchmaker and verified against The Watch Register before it reaches you. Each piece comes with our warranty and a 14-day return policy.