Help identify inherited IWC

I inherited this watch over 40 years ago. I have not worn it. It was
identified in 2006 as a Portofino, 18k gold, from 1940's or 50's, but I am not
sure. It needs daily winding but keeps excellent time.

Numbers inside read by jeweller recently as 1198607 and 149

photos at

www.instagram.com/p/CHGK43ss5WL/

I might give it as a Xmas present to my son, depending on its value.

Thanks for the help.

Hi Ampttoronto

Greetings from Toronto ... This is a very nice manual wind IWC Caliber 89
watch from 1949, long before Portofino name was used. It will make a most
excellent Xmas present for your son

We do not give valuations here