The freewheel appears to be original; it should be 14, 17, 22, 28, and 32T with the 28T and 32T cogs having 1" pitch for easier shifting in the lower gears.

Because of the chromoly fillet brazed frame and the lighter weight components compared to the similar Super Sport, the Sports Tourer has something of a cult following. I'd guess in that condition and assuming the frame is straight without stuck seatpost or stem, the right buyer would pay $300-$400.

Here's the 1971 Sports Tourer specification page: