I first got my 5131 was the platinum version, it was a surprise. I initially apply for a rose gold version, waited for two years but no luck acquire one. One day, my AD called and asked if I am interested in the platinum instead as they had one in stock. That was summertime 2017, new collection arrival usually delay at least six months, so I didn't think twice and went to the AD to get it right away.
Then I slowly search for other variations of 5131, noticed there were four time zone changes on the dial. It would be more fun and meaningful collection of 5131 with different metal and holds all four time zone changes. For the past few years, I looked everywhere for a particular reference of 5131G, 5131J, and 5131R. Finally finished the collection early this year.