The adventure model with 650b wheels were only made in 1987 en 1988. You see plenty Koga miyata randonneurs, randonneur extra, travellers (700c) from that period but almost never an adventure (650b)
Suntour command shifters
3x7 speed
Almost new.
bolts and nuts for the handle bar clamps are missing
45 euro plus postage from the Netherlands and PayPal fee