From a Schwinn collector's perspective, the 1973 World Voyageur is unique in that it's the first bicycle Schwinn ever imported. Schwinn was so sensitive to the "Made in the U.S.A." company reputation that it wasn't even branded as a "Schwinn", but rather a "World". Here's what the head badge looks like:
The next year (1974), Schwinn introduced the imported "Schwinn Approved" Le Tour model.