1¢ green, deep green
Subject: George Washington
Printing Method: Flat Plate
Perforations: Perforated 8½ vertically
Watermark: Single Line USPS (see below)
Scott #: 412
Issued: May 18th, 1912
Used
$15 - $25
No postmark with gum (MH)
$50 - $75
Full perfect gum, no postmark
no trace of stamp hinge mark (MNH)
$150 - $225
Add 50% for line pairs
Prior to the issuance of this stamp Franklin's head was used as the vignette subject. Indeed every 1¢ stamp issued in the US up to this point had Ben Franklin grace its design. The 1¢ was changed to George Washington and all values 8¢ and above were changed to Ben Franklin.
Another change was to change the value from ONE CENT to 1 CENT 1. This was to conform to the Universal Postal Union regulations that stated the value of a stamp has to be displayed numerically.
The earliest recorded use was on May 21st, 1912, as seen above
The Floreffe Hotel, Jefferson Hills, Pa (see envelope above). It still exists