That's a 1972 (frame dates to Aug. '72) World Voyageur with many changes from stock. About the only original parts are the frame/fork and headset. Both the frame and fork were fully chromed under the paint, but on this bike some of the Kool Orange paint was removed from the headtube and upper fork arms. That Nervar crankset (and most likely the GT-300 derailleur as well) came from a Sports Tourer, the original crankset on this bike was a Shimano GA-200 (1st gen. Dura-Ace) and the derailleur would have been a Crane GS.