Which hands did your Omega leave the factory with?
Type the case reference from inside the back, or the calibre. You get the hand types, lengths and Omega part numbers straight off Omega's own case sheets. No email, no sign-up.
Spaces, dots and the metal letters don't matter: 1660068, 166.0068 and ST 166.0068 all find the same watch.
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Right hands for the reference is line two of the report.
Line one names the movement. Line two checks the case was built for it. Line three checks the hands, crown and crystal against the sheets. If you're selling, that's what holds the asking price up; if you're buying, it's what stops the marriage. Six photos, the weight, a day.
Get it identified — $75 Read a real report first (PDF)How to read it
Hands are fitted by calibre and matched by reference. The hole in the hand has to suit the pinion of the movement, so a hand from the same calibre will physically fit any case that took that calibre. Whether it's the right hand for your watch is a question of the reference: which style, which length, lume or not, black or white body. That's what the sheet answers.
The type number (023, 050, 099, 147…) is Omega's style code for the hand. The millimetre figure is the length from the hole. Where a sheet gives two lengths (9.00/13.60) the hour hand is the shorter, the minute hand the longer. A WL or L number after the type is the dial the hand was issued for.
The source is Omega's 2012 case sheets, so the coverage runs to the references Omega was still supporting then — mostly 1990s onward, with a few earlier calibres (321, 565, 711, 863, 866, 1045). The hands tables for the 1950s–70s references live in the GF 620 catalogues on the shelf behind the bench and are being typed in now.
Metal letters
Letter meanings are the working decode used in the register; where a sheet says otherwise, the sheet wins.