#381 - 1911 10ยข Single Line USPS Watermark
See below for details
Basic Info
10¢ - Yellow
Printing Method: FLAT PLATE
Subject: George Washington
Number issued: 22,000,000
Perforations: P12
Watermark: Single Line USPS (see below)
Scott #: 381
Issued: January 24th, 1911
Value
Used
$2 - $3
No postmark with gum (MH)
$30 - $55
Full perfect gum, no postmark
no trace of stamp hinge mark (MNH)
$70 - $150
Notable Sales
A plate block of six which in mint never hinged condition is exceedingly rare.
Top plate block sold at Kellerher's July 2021 for $5,400 (MNH)
Explore Daniel Kelleher Auctions
Plate #'s
#381 was issued with the following plate #'s
Imprint and number
4940 -41, 43-44
Imprint, star and plate number
5200-13, 20, 43
A New Watermark
The purpose of this change was to strengthen the paper and to give it a more uniform thickness. The old double line watermark covered too much space and made the lettered area quite a bit thinner than the rest of the paper, which caused variation in the shrinkage of the paper. The new watermark was also smaller, occurring 400 letters to a full sheet instead of 360.
Single Line USPS Watermark
Earliest Known Use
The earliest known date of use for #381, January 21st, 1911
Essay's and Proofs
Essay created when it was thought that the registered rate was going to be 12¢
338 E1a
338 E1a
Essay created when it was thought that the registered rate was going to be 12¢
338 E1d
338 E1d
Die proof on India mounted on card
338-P1
338-P1
1910-11 Single Line USPS Watermark Issues
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