Portofino variants

  • 2 replies.
  • Last reply by Ben a year ago.
  • sweholstpanorama_fish_eye
    Apprentice

    Member since: 19/02/2024
    a year

    Looking to expand my collection with a white Portofino Chronograph. Can anyone enlighten me about the differences between reference numbers 391009 and 391028?

    Thanks!

  • Mark Flemingerpanorama_fish_eye
    Master 〚✅〛

    Member since: 07/07/2013
    a year

    Portofino 3910-09 has calibre 75320 and was produced from 2011 to 2019

    Portofino 3910-28 is a revised version with caliber 79320 and was introduced in 2019.

  • Benpanorama_fish_eye
    Master 〚✅〛

    Member since: 05/05/2008
    a year

    That is curious, as IWC had utilized the cal 79320 (ETA based) in the even earlier Portofino chronograph, the ref. 3783:

    I am not big on the gold, but I love the chrono pushers on this one. It is curious that IWC went from the ETA-based cal 79320 to the Sellita-based cal 75320, and then back again.

    Best regards
    Ben
    farm5.staticflickr.com/4590/39191395621_539b63622d_b.jpg

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