It's possibly a Mk 3.
If you haven't played a classic game in years, it's never too late to start!
Actually not end of world if it's a Mk 2 (though 3 is preferable :-))
If I get time in the next couple of weeks I will see if I can find it and will let you know. Not sure if it's boxed or has the manual though.
If you haven't played a classic game in years, it's never too late to start!