Nice job on that dial.

 

Medicus ?

EDIT - ok, a search tells me it's the movement http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Omega_23_4SC ;-)

 

Here's a shot with a typical Seamaster.

28.3-mm less crown x 37.6-mm

Movement is a R17.8 SC, ca 1942/43.

One of many cases from this period without a known reference, I don't find it in either AJTT or Omega Saga. Same case style was also offered with the R17.8 sub second movement, more common but still very rarely seen.

 

Great Pair, I have your seamasters RG twin... Was that seconds hand original? I quite like it ! Yours has the thicker bezel..