Nato isn't really an option for this watch (or any Oris diver) due to the proprietary lug spacing. You could purchase the black or white rubber from Oris, but that's about it. Someone on the forum hacked together a metal adaptor to put a nato on their Oris TT1, but it wasn't terribly attractive and isn't available unless you make your own or convince someone to make one for you.Just think of the different color rubber/nato straps. GREAT WATCH! Looks STUNNING on a navy or red nato.