Ron Guth:
The 1915-S Half Dollar is the third most plentiful date in Mint State. However, it is nowhere near as plentiful as the 1892 or the 1915-D. Nonetheless, collectors should have no trouble at all finding examples in MS62 to MS65. Slightly more than a dozen examples have been certified at the MS66 level. For those who seek the best, a couple of MS67's round out the grading curve. Much ado has been made about this being the final date of the series, and that may have something to do with the plethora of Mint State examples. Collectors continue to be fascinated by the first and last year of a design's appearance and disappearance, respectively, much to the benefit of modern collectors.