(15c) "A" Rate, Vertical Pairs, Imperforate Horizontally and Between (1735b, 1735b var). Two pairs, first Mint N.H. with most of a third stamp at bottom and diagonal perfs cutting thru the design of that stamp, this could be considered imperforate between, but since the horizontal perfs are well below the pair we are calling this imperforate horizontally (1735b, Scott Retail $500.00), second pair with sheet margin natural s.e. at top and slightly diagonal perfs cutting into stamp at bottom, smal