Yes, the serial # says this machine was made in April 1985. It starts with the date code you mention "D85" (D=April, 85=year 1985).
The next letter after the date code should be an "E" or "F."
Please do give me the picture of its nameplate when you get the chance.
BTW, the model number for this machine is 888 and in this case, going by the fact this was made in 1985, it would have a 5.4 amp motor.
~Ben