I think at one point folks did consider the Boston Store, Weil Bakery, Collins McCarthy, and Standard Biscuit to be Ruth rookie cards but as the print dates became further clarified, his rookie has been narrowed down to the m101-5/4.It is clear now that the M101-5/4 were printed in 1916 and the Boston Store et al were in 1917. AGAIN, NEVER MIND THOSE DATES ON THE FLIPS BELOW. Also, don't mind that damn sticker the Mile High put on the Std. Biscuit card.I believe folks have had to concede that both the M101-5 and the M101-4 are Ruth rookies since some backs occur in both print versions and the number (151) is the same on both.Tim and Todd know a lot more about this than I do, but they have said before (to paraphrase): "you'll have to read about it in Old Cardboard." I had to have this one since it is a confirmed earlier print cycle: The Sisler Rookie card is an interesting argument. Are both the M101-5 and the M101-4 his rookie cards? It's easy to tell the difference in the print cycles: 1) the numbers are different - 166 in the M101-5 versus 164 in the M101-4; and 2) I personally believe it to be meaningful that the M101-5 designates him as a pitcher (see scan in post above) while the M101-4 declares him as a first baseman " 1B ".All those Rice cards are rookies.