The Type II Buffalo Nickel series ran from 1913 through 1938, and it is one of the most widely collected series in all of U.S. numismatics. This type was created when the Mint discovered that the Type I Buffalo Nickel did not hold up well in circulation. In particular, the placement of the reverse denomination FIVE CENTS on a raised mound was most unfortunate because this critical feature rapidly wore away with use. In the new Type II design, the Mint placed the denomination in exergue below the straight line upon which the bison was now made to stand. Additionally, Mint Engraver Charles E. Barber (who carried out the modifications to James Earle Fraser's original work) also smoothed out the fields and slightly modified the Native American's portrait on the obverse and the reverse bison which had the result of erasing much of the charming rusticity of the Type I design. While Barber might have envisioned that his changes would improve the durability of the design, this did not happen. Even more significantly for today's numismatic buyers, the new design did not strike up as well as its Type I counterpart, and there are many issues in the Type II series that are extremely difficulty to locate even with bold definition. Quality-conscious collectors and investors are encouraged to focus on examples in the higher Mint State grades, at which levels the leading third-party certification services are keen to take strike into account when forming their assessment of the individual coin.