It's a bit hard to make out from the profile, but she sure looks like Vivien Neves (professional name), who was the face and body of Norton in the 70's. She contracted MS in her 30s and died in her mid-50s. Her face is featured in the famous "Temptation" Norton ad of the early 70s. A striking woman.

Rick in Seattle
1970 BSA 441 Victor Special
1972 Norton Commando 750 Combat
1975 Norton 850 Commando Mk3
1960 Triumph TR3A