OMEGA Dark Side of the Moon 310.92.44.51.01.004: specs and checks

Ceramic fails one way, and one way only

OMEGA specifies the case as black ceramic and, separately, the buckle material as ceramic.

That single material choice replaces almost everything you normally do when grading a case.

Ceramic is dramatically harder than steel. It does not pick up the hairlines that accumulate on a steel case from ordinary wear, so a used example can look untouched after years on a wrist. There is no satin surface going shiny, no softened edge, none of the wear pattern you read on a metal watch.

What ceramic does instead is chip. It is hard and it is brittle, and when it finally meets something unforgiving it loses a small bright flake — usually at an edge or a corner, usually the size of a grain of rice or smaller.

So the inspection is different in kind. Do not scan the flanks for scratches; you will not find any and you will conclude the watch is perfect. Tip the case until light rakes along every edge and travel the whole perimeter: the lug tips, the bezel edge, the transition from case band to caseback, the crown guards.

Then do the same to the clasp.

Nothing here can be refinished

This is the part that changes the price rather than the description.

A marked steel case goes to a watchmaker and comes back. A chipped ceramic case does not. There is no polishing a ceramic watch — the material cannot be cut and re-finished the way metal can, and an attempt simply removes more of it.

So any damage you find is permanent, for as long as the watch exists. Photograph it, describe it explicitly, and take the deduction at the buy rather than absorbing it at the sale. A buyer who finds an undisclosed chip on a ceramic watch is not looking at a cosmetic issue; they are looking at a condition that can never be corrected.

The same logic applies to the ceramic buckle. A dropped clasp on a steel watch is a cheap replacement from any parts drawer. Here it is a material-specific component, and a steel one fitted in its place will be obviously wrong in colour and weight.

A hundred and eight grams

The published weight is 108 g on a case 44.25 mm across, 15.09 mm tall, and 50.00 mm lug to lug.

For comparison within this brand, the 42 mm steel Planet Ocean weighs 177 g.

That is the argument for the reference, and it is a factual one. Ceramic and a rubber strap produce a very large chronograph that weighs less than most mid-size steel watches. Quote the number; it says more than any adjective.

The height, though, is real: 15.09 mm is tall, and a fitted cuff will notice. Give the buyer both figures.

Fifty metres, again

5 bar (50 metres / 165 feet).

Every Speedmaster documented on this site carries the same rating, and every one of them looks considerably tougher than that number suggests. Rain and hand washing; nothing else.

The movement is the calibre 9900, self winding, 60 hours, Master Chronometer certified. The crystal is sapphire treated on both faces: grade the exposed layer for wear, then look behind the glass for bloom.