The following series represents a design change for the coinage away from the traditional two head eagle with wings extended to an eagle in the clouds. In 1756, the design was altered to help regulate weight and extend die life. The change consisted of minting a thicker planchet with a smaller diameter. The thinner planchets were usually over weight (an average weight of 1.4 grams measured from my specimens.) instead of the required 1.21 grams.