IWC

The genesis of the Portugieser line starts with this series of watches. Introduced in 1939, it initially had no name nor reference number. It was recorded in IWC’s records with “Mod. 228” for the case model. As for the name, the story goes that a wholesal...  

I think you’ll find that the crowns weren’t necessarily consistent with the Portugiesers. They were manufactured in batches and at different times over the course of at least a decade. If IWC still sponsors a dedicated Forum then I would suggest you post ... 

www.iwc.com

Clunky and non-user friendly though it may be.

I suspected that could be the situation but wasn't sure.

my 228 is with similar thin crown. I also notice the thick and big crown is for ref 325.

Thanks for the information.