Portuguese perpetual calender (differences between older and newer model?)

Hello,

Can anyone tell me the difference between the older 502307 and the latest 503301?

Thanks alot!

Christophe

Hi there Christope!

When I was still at Monochrome I wrote an article about that. Here you have a link.

Hope this will help you

monochrome-watches.com/comparing-the-old-and-new-iwc-portugieser-perpetual-calendar/

Koensimon's excellent article depicts the difference best.

Personally, I don't understand why IWC put a black strap on all their latest Portuguese Perpetuals (except the 503302). Dark brown fitted the ardoise dial superbly; so did the dark blue strap on the midnight-blue dial.