I'm curious if anyone knows the meaning or the background of why some frame makers like Ciocc, Colnago, Richard Sachs, etc. use playing card symbols on there bike frames. Mostly I have seen them on the forks but I'm sure there are other examples elsewhere in the lugs.

Anyone have any insight? Is it to pay tribute to something or to show that the rider is a gambler?

It's just something I have always wondered about.

From Richard Sachs: