Series 3 chrome ring and early non chrome model headset bottoms were
fitted with the same A1972 cast number headset tops. Later
non-chrome-ring models around the time of SX150 introduction were fitted
with the P1241 cast headset tops.
Spotted by: Michael Carthy
The fibreglass font mudguard was also fitted to some TV175 models as
well as the TV200. The TV mudguard is slightly narrower than the later
Spotted by: Oscar Norlin, (LCSTHLM Sweden)