Points of significance. 

1.Old-style painted dash
2.Old-style protruding door handles
3.Three-spoke wood-rim steering wheel
4.Seats = 1750/2000 type, though later cars have horizontal stitching, and modern carpeting
5.14in wheels and 165 tyres (options to the old-style Duetto 15in wheels and 155 tyres)
6.Engine with larger 1750-type sump
7.Carbs - Dell'Orto DHLA 40 or Solex C40 DDH6
8.4.3:1 final drive