Looking Back #14 - USA - Electric Eye Stamps on Thin Paper

Electric Eye Stamps on Thin Paper

Albert C. Butzen of Detroit, Mich., has shown me a block
of four of a stamp from this printing on a paper considerably
thinner than that in regular use and thinner than other
sheets from the Electric Eye printings. The paper has a
greater transparency and there is the possibility that
the Bureau, when conducting experiments with perforation,
also experimented some with paper.

As a general rule, stamp paper at the Bureau is held to a very
rigid standard and lapses such as the above are rather unusual.


- George B. Sloane
Sloane's Column
Stamps
May 25, 1935

Note: Scott recognized this by the following note after 634:
"No. 634, Type I, exists on a thin, tough experimental paper."