Still in two minds about selling this as I will never see another but there we are.  Moved to 5 string basses and unlikely to go back to 4. This is a 1973 Yamaha SB-35 bass.  There is very little information around about these, mainly some research done by a chap a few years ago who posted a few bits here and there. https://www.ultimate-guitar.com/forum/showthread.php?t=690834 https://yamahamusicians.com/forum/viewtopic.php?t=3873 More recently here: https://www.basschat