Description
C.1924 TRIUMPH 550CC SD REGISTRATION NO. KM 8169 FRAME NO. 340231 ENGINE NO. 101461 (SEE TEXT) Triumph's 3½hp model had first appeared in 1907. Originally of 453cc, its sidevalve engine was enlarged to 476cc in 1908 and finally to 499cc in 1910 before being superseded by the 550cc 4hp model...