The first half is from 19th May 1968 with 60,000+ spectators. The 350 race held late afternoon after an earlier shower with Mike Hailwood (Hinda 45) & Phil Rad (Yamaha 73) (apparently Read had only one front wheel for his two bikes that day! Date of 2nd half is unknown but maybe 1967. The Honda (103) has the name M. Sumiya on the fairing - a light 750cc racer developed from the CB500/4.