APPROXIMATION 1969-1970 OMEGA WATCH REF 131.019 SP CAL 600 SWISS MADE MECHANICAL HAND WINDING MOVEMENT 17 SEVENTEEN JEWELS WORKING PERFECTLY. OMEGA WATCH CO. 21482905 MARK INSIDE THE MOVEMENT. WHITE COLOR DIAL WITH GOLD COLOR MARKERS. CASE MEASURED APPROXIMATE 39 MM LUG TO LUG  33 MM WIDE EXCLUDE CROWN. THICKNESS OF CASE INCLUDE CRYSTAL IS 8MM. SOME SIGNS OF SCRATCHES AS NORMAL WEAR AND AGE. SELLING AS IS BLACK COLOR LEATHER BAND WITH GOLD COLOR BUCKLE  (NOT) ORIGINAL OMEGA. ANY QUESTION PLEASE EMAIL