Originally Posted by
CardiacKid
I can remember this being the case in the Olympics in the 1960s. No offense, but your source isn't very persuasive.
The relevant rule regarding decals was actually enacted by the British RTTC (Road Time Trials Council) in 1938. Hetchins began building bikes with the vibrant rear triangle in 1935 (and as per my post above, Jack Denny developed the design for frames he built prior to giong into business with Hetchins.)