Since the 1977 model serial numbers start at: 9A254045, and the 1978 model numbers start at: 9A276935, my best guess would be that your MF-285 is a 1977 model.
Source page:
http://www.tractordata.com/farm-tractors/000/7/7/775-massey-ferguson-285.html
What year is a massey ferguson 165 with a serial number of 37786240?
year of massey ferguson 35 with serial number 251807
what year is massey ferguson 240 with a serial number of b17204
1968 http://www.masseyfergusontractorparts.net/Massey-Ferguson-tractors/2008/06/massey-ferguson-135-serial-numbers/
1968 http://www.masseyfergusontractorparts.net/Massey-Ferguson-tractors/2008/06/massey-ferguson-135-serial-numbers/
The Massey Ferguson 240 S with the serial number 9537G19029 was manufactured in 1987. The serial number can help identify the production year, as Massey Ferguson typically follows a specific numbering system for their tractors.
1964
It's a 1969.
1973
The engine serial number 37111280 for a Massey Ferguson 35 indicates that it is likely from the early 1960s. Massey Ferguson 35 tractors were produced from 1957 to 1964, and specific serial number ranges can help pinpoint the exact model year. To confirm the precise year, you may need to consult a Massey Ferguson serial number guide or database.
The Massey Ferguson 240 with serial number V39092 was manufactured in 1980. The serial number indicates the production year, which aligns with the typical numbering system used by Massey Ferguson during that period.
1973