If the perforated 12 stamps separated too easily in the vending
machines, and the perforated 10 stamps were a little too hard to separate, you guessed
it, the
perforated 11 was just right. In
1916,
eight years after the first Washington-Franklin heads were issued, the Post Office
finally experimented with an
approximately 11 gauge perforation on the 2c denomination only. It was printed
on the single-line watermarked paper stock of that year, and
is listed in Scott as number 461.
The
experiment proved successful, so successful in fact that
nearly all subsequent U.S. issues have been printed using this
perforation, or a slight variation of it, e.g. perf 11 x 10.5.
Thus, a year later in 1917,
the entire series of Washington Franklin Head stamps were
issued using the 11 gauge perforation on the new unwatermarked
paper stock. These stamps are listed in Scott as numbers 498 through 524
(and 547),
and are often referred to by the nickname "Flat
Elevens".
As is the
case throughout the Washington Franklin series, a few stamps
in this set defy classification. To cut costs, a two cent
stamp was issued by perforating some imperforate sheets of the two cent stamp of
Set I, Scott 344, with the
new 11 gauge perforation. Since this stamp was issued in late
1917, at the height of World War I, and since the
perforation is 11, it is included by most experts in this Set,
and is most commonly listed as Scott 519. It should be
noted that this stamp has more in common with Scott 332 from
Set I than the Scott 499 of this set. This is a stamp that
certainly defies classification!
Note that the
$2 red (carmine and black) Franklin stamp, Scott 547, is
thought by many experts to be merely a color variety of the
orange red stamp, Scott 523. In fact, when the stamp was
designed the intent was for the frame to be red, making the
orange red something of an error stamp. The correction was
made quite early in the production of the $2 stamp, making the
orange red "error" variety quite scarce.