Interesting bike. Any chance you can find out more of it's history? The original owner should recall more about a bike that traveled the world with him. The real experts will be here in awhile. Those lugs are quite distinctive. Can't recall seeing any like that. Looks like 70's vintage. Be prepared to take more pics. It may be camera angle but that front wheel looks too close to the down tube. Handlebar stem appears to be over extended.