Triumph 4 h.p. Components, 1920 4 h.p. Model
Part sectional view of the shock-absorber fitted to the engine shaft of the 4 h.p. Triumph.
Channels are rolled in the new Triumph rear guard to carry away liquid mud.
Olympia Show, The Motor Cycle, December 2nd 1920.
Triumph 4 h.p. 1920