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Posted By: davidcycleback

The postcard versions have a black and white dot pattern in the image-- easy to see under strong magnification. The T5s have no dot pattern because, as already noted by Joe, the are real photos. The T200s and T222s also are real photographs like T5s, so if your Pinkerton resembles your Fatimas and has no dot pattern, it's a T5 (sans mount) not a blank back postcard. Gloss and light surface cracking as you describe is common to real photographs of the day, including the Fatimas.