Five questions about hands, case, and dial text — answer from the watch in front of you, and the tool will narrow it to a reference family. This is a starting point for research, not a certificate: dials get swapped, parts get replaced, and the final word always belongs to the reference guide and a loupe.
How to answer well
- Hands: Broad Arrow hands flare into a wide arrowhead; alpha (dauphine) hands taper like a sword; baton hands are straight sticks.
- Case: straight-lug cases (~38–40mm) have no crown guards; the asymmetric lyre-lug case (42mm) wraps around the crown.
- Dial text: look under “Speedmaster” — early dials read nothing more, later ones add “Professional”.
- Logo: applied Ω is a separate metal emblem you can catch a fingernail on; printed is flat ink.
- Bezel: DON means the dot sits over the 90 on the tachymeter; DNN means it sits next to it.
When the tool gives you a family, confirm it against the reference guide — sub-references, bezel correctness for the serial, and caseback type are where the real identification happens.