The '72 World Traveler was the very first imported "Schwinn". These bikes were shipped over as complete bikes made by Panasonic for Schwinn. The crankset was most likely made by Takagi as a clone of the Schwinn double plateau crankset. The Japanese cranksets were labeled "Schwinn Approved" while the ones made in Chicago were just "Schwinn". The same goes for the spoke protector, headset, and other parts on the bike. In other words many of the parts such as the crankset were made under license as almost exact duplicates of the Chicago made Schwinn parts.