Yema - a french watch brand. See
great overview and history here. Even
more info here.
And
Yemania Vintage - the site of Yema vintage collectors worldwide.
In 1970 Yema introduced the Yachtingraf Régate type 6. The normal case was 39 mm and too small for this blog BUT also a Jumbo version measuring 44 mm was made. The Jumbo should be recognizable on the small ship on the dial above 6 which is in a blue circle.
A super delicious and recognizable watch!
I seriously want one. Only problem: I have never seen one for sale.