From http://www.iomtt.com/

Isle of Man TT  Santiago Herrero - Results   TT 1970, Lightweight 250 TT Posn No Rider Name Machine Time Speed DNF  - Santiago Herrero Ossa 0.00   TT 1969, Lightweight 250 TT Posn No Rider Name Machine Time Speed 3 - Santiago Herrero Ossa 2.26.21.0 92.82   TT 1968, Lightweight 250 TT Posn No Rider Name Machine Time Speed 7 - Santiago Herrero Ossa 2.27.42.8 91.97