Originally Posted by
repechage 
Long ago, that Reynolds transfer meant that THAT tube was 531, not the three main tubes, just that TUBE, hey they even used creative marketing back then...
I wonder about that.
I recall reading an advert. or something simular a while back that the main tubes of the Super Sport were 531 which seperated it from the #21. The two frames shared the same geometry. It think..if I remembered correctly?
What a cool bike to see! I love the Orange, it weathered well, has such a classic look. Do you know the story of how it got to the States?