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Pennsylvania Ted1st....Scot Reader and I are 99.9% convinced that Ames, Doyle & Schulte are 150-only Subjects (hence, total of 12 subjects).
2nd....then the 150/350 has 141 subjects plus 3 double-prints = 144 subjects
3rd....the 350 series comprises 208 subjects + 6 super-prints** + the two St. Lo. vars. (Demmitt & O'Hara) = 216 subjects
NOTE ......the 6 super-prints are by initial design 350 series cards since their American Beauty backs are FRAMED.
Subsequently, American Lithographic decided to extend these 6 cards into the 460 series.
T-Rex TED