Halfway the Thirties Omega introduced the caliber 23.4SC which became popular in the medical world because of it's central seconds indication. This was enhanced by Om. marketing department by bringing out a dedicated series 'Medicus' - a smallsized wristwatch, available in round or square case.

Earlier this year we discussed a 1940 model with apparently mil. markings: true or false? But why would someone apply 6B/159 markings to such a small and unobtrusively looking watch? (Graham's reaction at the time: "It looks genuine to me") When comparing both watches i realised the answer was staring me in the face: with almost similar dimensions and lay-out it is a Medicus model as well and presumably used by a military doctor (or nurse?).

The mil. model has a water-resistant case with screw-on back.

In the design of the dial the emphasis is on the seconds presentation (heart rythm etc.) on the outer circumference, the plain time display inside that.
Does that sound like a plausible story?
thanks for reading, Ben.