[RCMcKenzie]

There were 25 cards in the Novelty PC set. 25 was a common number for sets of the era, i.e.- "set of 25". Most sets that are released over a number of years are not comprised of a round number, or standardized number. Old Judges, from 1886-1890, are still being found, the number of cards is vast and irregular. T206 are found in all sorts of random numbers no matter how you group and subdivide them. Given that 1910 was Frock's only significant major league season, plus the known postmarks in 1910, to me, the 25 cards were all made together in 1910. Just a guess.