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Tim NewcombPSA has graded 8 M101-5 Thorpes: 2 PSA 3-4, 3 PSA 5, one each of 6, 7, 8.
One of these is a Famous and Barr, the others appear to be blank backed
SGC has graded 5, one 20, two 40, one 70, one 84. Of these two are F&B, one Standard Biscuit. The other backs are not specified in their Pop Report system.
Because it is only in M101-5, the Thorpe card is considerably tougher than the average M101-4. Whether it's tougher than the other M101-5 onlies (Chance, Marsans, Herbie Moran, etc.) is debatable.