Breguet No. 1646 Diver Watch: A Newly Discovered Vintage From 1965 - by Ariel Adams - Read the whole story and see more of the watch on aBlogtoWatch.com "This is an interesting story about a rare Breguet dive watch previously unknown to most collectors that was produced in 1965. It is known as the Breguet No. 1646, and apparently, only 60 pieces were ever produced. We don't talk about vintage watches all that often on aBlogtoWatch, but this is a worthy exception..."