The 5164a came out at Basel in 2011 and is what Ben Clymer called "arguably the coolest Aquanaut to date." I've always found the pushers for the travel time complication the most elegant way to quickly change time zones so it's been my number one "daily wear grail" for years
link now.
link The 5164R in rose gold is still
link in the lineup but I just like going under the radar with steel. Anyway enough about my sadness let's get to the rest of the discontinuations.