I know that watch well. Mine is an 18ct rose gold reference 1403 (I think) caliber 341 too. 1961 was the only year Longines did the date-at-12 Flagship automatics. I think that medallion with the two tone blue enamel is very cool. Unlike the Conquests which featured the same date location the previous year, the Flagship did not offer medallions on the solid gold models. Instead they did raised relief 3 mast argosies.