First, second, and third place award patches for Duncan Yo-Yo Contests by Flambeau, from the late 1960s to the early 1970s.
In 1968, Duncan became a division within Flambeau, Inc. These particular patch sets are Flambeau-branded and probably were being awarded from the late 1960s into the 1970s. Note the new registered trademark symbols after Duncan and Flambeau.
Compare this exhibit with the non-Flambeau-branded patches also in this museum.