Buffet didn't stop saxophone production in 1985, but the serial number charts available on the internet stops in 1985.According to.Buffet. sax production stop in 1985(but not clarinet )s.n 35xxxx but i found a s1 sop s.n 37xxxx. looks like first owner ...(a pro player) got it new in italy in 1989....so what?
The S1 was in production until 1989 and the S3 Prestige alto was made to about 2005-ish. (And the Senzo from 2013)