When Schwinn first allowed their bikes from Japan, it was Panasonic who made them. I had a 75 Traveler that was like yours, only lower end. The bottom bracket was one piece though. It was a great ride, although Schwinn purists hated them, but the Chicago made "real" 10 speeds weighed a ton. Later on, Giant made the imported bikes for Schwinn. I rode that bike from Tampa to Jacksonville in 36 hours back in 1978.