Scott 134 and 145 - There is absolutely no blue in the ball left of
the numeral "ONE".
Even the slightest hint of a blue dash will relegate this stamp to
Continental or American status, since the secret mark often is very light.
1¢ Bank Note
with Secret Mark
Scott 156, 182 and 206 - If there is even the slightest hint of blue in the ball left of
the numeral "ONE",
this stamp must be considered a Continental or American Bank Note printing.