Thanks Jan, that seat is staying put (well actually it belongs to my Raleigh). It is stamped 1987, but it looks like it wasn't ridden much if ever. The owner of the International gave me some advice to break it in.... completely remove the leather cover, soak it in neatsfoot oil, hit it with a hammer then fold it for hours and hours...
His saddle literally felt like a baseball glove, I don't think I will be going that route.