According to the Amal reference catalogue the 10TT 1 5/32 was fitted to the B34 1949 - 54, Super rocket and Spitfire 1960-61 and Norton 30 1946 -54. The same model was fitted to various machines, Velocette, Vincent, Indian, Matchless, AJS and Ariel but they were 1 1/16, 1 1/8 or 1 3/16. All the best Goldy