OMEGA Aqua Terra Worldtimer 220.92.43.22.99.001: specs and checks

Ninety-four grams

OMEGA publishes the complete weight as 94 g, on a case measuring 43 mm across and 50.00 mm from lug tip to lug tip.

Put that against the rest of the brand's range documented here: the 42 mm Planet Ocean is 177 g, the 41 mm Constellation 171 g, the Ultra Deep 254 g.

So this is a physically large watch that weighs little more than half what a steel watch of similar size weighs. Two decisions produce that: a titanium case and a rubber strap.

It is the single most useful thing to tell a buyer who has decided they like 43 mm watches on paper and found them unpleasant in practice. Lead with the weight, not the diameter.

Titanium marks differently, and that is not damage

Grading a titanium case against your memory of steel produces the wrong answer every time.

Titanium is softer at the surface and duller in colour. It takes marks that are broader, greyer and shallower than the bright hairlines steel picks up, and under a raking light an honestly kept titanium case can look more used than a steel one in identical condition.

Calibrate before you discount. Judge titanium against titanium.

Note also that OMEGA specifies the buckle material separately on this reference: titanium. Hardware from a steel OMEGA is not a substitute — the colour is wrong in the hand and the weight is wrong on the wrist.

Rubber has a shelf life

The strap is black rubber, and it is the component with the shortest working life on the watch.

Rubber does not thin or fray in a way you can see lying flat. It perishes, and perishing begins inside a crease — at the tight doubling by the case, and again wherever the band curves round the wrist.

So do not inspect it flat. Take each end, bend it right back on itself, and open the fold toward a light. Fine parallel cracking in the bend means the strap is at the end of its life regardless of how the outside looks.

Check too that it springs back rather than holding a set, and that the spring bar holes are still round.

A replacement is a cheap part on a watch at this level. An unmentioned perished strap is not a cheap conversation.

A world time display needs a day to test

The movement is the calibre 8938, self winding, 60 hours, Master Chronometer certified — a movement that appears on no other OMEGA documented here.

Its world time function is the reason. Setting it takes a minute; testing it takes a day.

Set the display to a known city and a known offset from local time, then leave the watch alone and come back twenty-four hours later. What you are checking is not the initial setting, which anybody can do, but whether the two readings still agree after a full rotation. Divergence between the two readings points at the movement itself — and a short viewing on the counter will never reveal it.

Sixty hours of reserve means you can run that test with the watch off the wrist.

The rest of the sheet

15 bar (150 metres / 500 feet) — an everyday rating, not a diving specification, on a watch wearing a rubber strap.

14.12 mm thick, 21 mm between the lugs, dial listed as grey, crystal domed sapphire treated on both faces — so check the outer coating for wear as well as looking through for interior haze.