FD-M910 looks pretty worn on the bottom plate, certainly not 9/10 mechanically.
Also the date code points to 1992/1993 (cannot tell if it's a Q or an R) but it's the same model used in 1995.
ST-M900 are not 1995 (that would be M910) but 1992-1994
(only mention because a year is pointed in the sale pictures and they are not)