I finally got the plane I was looking for. It is the HB-HOS. I believe this is the plane that did the Round the World flight for IWC back in 2002 or 2003. It is the Junkers JU-52/3m plane. I was very lucky to be able to see and touch the plane when it did its Round the World trip. That was at that time I got interested in IWC and its Pilot watches.
Wing Span: 29.25 m
Length: 18.90 m
Height: 6.10 m
Weight: 6,500 kg
Max take-off weight: 10,500 kg
Cruise speed: 250 - 295 km/h
Range: 1,290 km
Max Altitude: 5,500 m
Engines: Pratt & Whitney PW 1340 S1 H1 Wasp
Love the picture of the Big Pilot (the older version that I like) on the wings. It is on the underside of the other wing. OK port side.
Here is my small collection of the plane. From left to right, the IWC plane, HB-HOS Ju-Air (1:250 scale), the Swiss Air force plane, A 703 (1:400 scale) and the Austrian Air Plane, OE-LAM (1:160 scale).
The IWC plane with my IWC mk. XV. It would be nice if I had the Big Pilot 5004.