Is this really for sale now? Citizen Re-issue NB6021-17E | WatchUSeek Watch Forums
Citizen "Challenge" NB6021-17E Promaster Diver Super Titanium Black Dial - YouTube
My Eastern Watch Collection: Citizen Promaster Dive Automatic SUPER TITANIUM NB6021-68L 'Fujitsubo' (similar to NB6021-17E) - A very Usable Watch, A Review (plus Video)
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CITIZEN promaster NB6021-17E Mechanical Super titanium watch – IPPO JAPAN WATCH