When we think of IWC's 125th anniversary in 1993, the Jubilee Portugieser, Ref. 5441 is usually the first watch that springs to mind. The second watch is the Il Destriero Scafusia, Ref. 1868 in a limited edition of 125 pieces.
There was however a third watch released to mark the 125th anniversary and its details can be found on the link below.
Cheers from the cellar
The 125th Anniversary Portofino