This one arrived yesterday

14k "Cushion" shape case Omega signed case
Cal. 26.5 SOB T1
From 1934/35 according to serial
ca. 30 mm. ex/crown

Struggling to figure what the reference is. The only case I think that have the same shape is the "Euroos" model. The add. with "Euroos" is only shown in steel and an other dial and hands, so maybee the 14k. had other dial and hands to match the gold case, who knows Our expert @Tire-comedon is digging in his archives.

I have never seen so many Watchmakers markings in a case before, one of the watchmakers HE took care of this watch from second half of the 1930's until the 1970's, sometimes only to years between service