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Vertical bar spacings on the back of the $1 and $5  duty plate.

The half of the duty plate that printed the front of the two lower denominations consisted of the denomination numerals, the lines around them, some ornaments, and the denomination spelled out. Obviously this had to be reset every time they changed over from printing one denomination to the other. But the half that printed the back consisted only of the frame and a double-line vertical bar to frame the right side of the Juarez portrait. This invited little attention until Crutchfield Williams pointed out some variation in the spacing of this vertical bar relative to the left side of the frame. The first measurement is the distance between the double-bar and the left frame line. The measurement in parenthesis is the spacing between the two lines that comprise the vertical bar.

46 mm (1.0 mm): 1 peso 24 Feb '15 - all, 20 Abr '15 - J and A series.
5 pesos 24 Feb '15 - all
48 mm (1.0 mm): 1 peso 20 Abr '15 series E through 26 Junie '15 (all)
5 pesos - not found.
48 mm (.75 mm): 1 peso 19 Julio '15 (all) through 24 Sept. '15 2nd P series.
5 pesos - not found.
46 mm (1.0 mm): 1 peso - not found.
5 pesos 10 Ago. '15 (all) into 24 Sept. '15
43-44 mm (1.0 mm):

1 peso 24 Sept. '15 3rd Z series into 24 Sept. '15 4th Z series
5 pesos middle of 24 Sept. '15 to the end (28 Feb. '16)

43-44 mm (.75 mm): 1 peso Middle of24 Sept. '15 4th Z series to end (15 Nov. '15)










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