Jordan999, nice piece with an absolutely magnificent calibre inside of it.
It looks good on your wrist too, and the dial is in seemingly good shape. If it was mine, I would send it to IWC to have the case and bracelet
Of course, Herr Ernst Maurer might not take that kindly to the thought of you offering to swap out a watch he worked 20 long years for (and then, for a modern timepiece!) - LOL
Nice start to a collection, get an extract from the Register for it - and you are one your way.
Best regards
Mark