I have had the blank backed and scorecard back. The Baker Leon Posted that was used as a postcard looks like the original Pinkerton T5 photo. Similar to the below image of Collins. I am also attaching a PSA Pinkerton blank back with W530 Pinkerton 1913-1915. Where that designation came from I dont know. On the PSA website the Cobb they show does not have the W530 designation but the Dooin I am posting does. It is also good to note that PSA listed the post card back as one of the 3 types of backs but of the 44 graded none have a post card back . It appears PSA lifted the information from the Standard Catalogue the also mentions three backs to the printed Pinkertons which came out 2 years after the photo series
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