Longines Exclusive Movement-Master Collection Retrograde Longines Luxury Watches Swiss watches by wholesalewatches - December 4, 20150 Longines’s Master Collection Retrograde has an exclusive movement with no less than four retrograde functions. A watch which directed the specialists at ETA to create one. For its part, ETA welcomed the challenge, using as its canvas the Valgranges line of calibers, descendants of the classic Valjoux 7750, which are known