The model of this watch is “Compax”. C.1937. Calibre 285 , manual movement.
Dial: This dial is glazed with Arabic number printed in black and leaf hands made of burnished steel. BEST CASH OFFER - SERIOUSLY - ALL OFFERS ENTERTAINED! (make an offer!)  CALL JAN 403-350-4538

A Black Dialled Watch sold at Christies for CHF38750.00 in November 2015.  http://www.hautetime.com/results-from-the-geneva-watch-auction-two/71173/

Case: Made of polished and glazed 18k yellow gold in three parts with lunette and release back. Rectangular push-piece and normal and curved handles – 34mm