This is interesting because it has a SunTour Seven rear derailleur, which was introduced for the 1976 model year, yet it still has the older oriental logo. The front derailleur appears to be Shimano and it has a cotterless crank. The serial dates it circa 1974-1975. So, I assume it has been frankenbiked and neither the derailleurs nor crankset are OEM. The stay design is not typical of the International of this period. That leaves the Olympic and Sport variants, both of which used the same frame. It looks like it may have the remnants of Custom Sport on the down tube.