I changed the date from 1965 to 1950. The reference is a Japanese site I can't read and the only other hits on Google all appear to be wikipedia mirrors. The date 1950 has at least been published, whereas I got nothing for 1965 on GoogleBooks. I was under the impression there were few bulls even over 55-57 ft in length by the mid-1960s, let alone 60+ feet. A better reference needs to be found for the length and date though.