The Citizen Promaster Eco-Drive Professional Diver 1000 BN7020-09E watch hands-on

Giovanni Di Biase23 March 2021
3 Comments

3 Commenti

  1. MICHAEL WEINBERG

    You say “I would have expect Citizen to come up with a case with no helium-escape-valve; a goal that Citizen could easily achieve and that his Japanese competitors have reached already.”

    Yes, Seiko has done this. However, in saturation diving, you cannot set or reset the time of the watch while you are under pressure without pulling out the crown. This will admit helium into the watch despite Seiko’s L-shaped design, and there will be helium in the watch that needs to be released through a valve during decompression.

  2. Stefano

    Bella presentazione, molto completa e ricca di dettagli.
    Mi congratulo per le considerazioni fatte sulla cosiddetta “valvola dell’elio”, un ancronismo gia’ del tutto inutile sullo Autozilla ed immagino inutile anche su questo nuovo professionale.
    Credo che Citizen continui a prevederla per pure questioni marketing anche se alla fine rappresenta una via d’acqua in piu’ che su un professionale…beh…insomma.

Your comment