As far as I know, it has been discontinued around the year 2015 and replaced by new designs. The crown is for rotating the inner bezel!

Let me introduce my Hamilton Jazzmaster Traveler GMT, disguised as a diver's watch. While this being the original form, i could easily catch some diver's aspects. 1. 660ft(20bar) water resistance 2. a diver's-watch like inner bezel Apart from other jazzmaster watches, this watch is the only one with

I'm interested in reverso grande taille but i found it to have a solid caseback. Does anyone know if i could customize the watch and make it transparent? And if possible I would like to be informed of the price Thank you.