Thanks for the photos. My reply to Ray K's posting of "A Brace of Bridgestones" has a You Tube link to the start of the 1966 50cc Dutch Grand Prix. At about 0:09 you can see two Bridgestone being moved and started in the paddock are. At 0:39 the #10 machine of Morashita is clearly visible with Bridgestone #8 following. The third BS (probably #9) is in the back ground at about 0:40. It appears that # 10 was "loadded up" since it smokes quite a bit as it pulls away.