1½¢ - Deep Brown
Printing Method: Rotary Press
Subject: Warren Harding
Number issued: 8,990,000
Perforations: 11 x 10½
Scott #: 670
Issued: April 15th, 1929
$1 - $2
No postmark with gum (MH)
Full perfect gum, no postmark
no trace of stamp hinge mark (MNH)
$2 - $3
#670 was issued with the following plate #'s
The true first date of issue of #670, was April 15th, 1929, the day it was issued in Nebraska, as shown above. It was later sold at the Philatelic Bureau in Washington DC on May 1st, also as first day issue.
A pane of 100 of #670, there were four panes to a sheet of 400
To prevent the thieves from transporting stamps out of Kansas and Nebraska and selling them elsewhere, the Post Office tried overprinting the letters Kans. on stamps slated for sale in Kansas and Nebr. on stamps that were to be sold in Nebraska. All post offices in Kansas and Nebraska received overprinted stamps except for Kansas City, Topeka, and Wichita, Omaha, and Lincoln There larger post offices were not included as security at those post offices was considered sufficient. Higher values were not included as the overprints could only be performed by rotary press.
This was an experiment, which if successful would be extended to all states. These overprints would be valid throughout the United States. However it did not prove a success as many postal workers in the USA were not aware of these overprints and would not accept them as valid postage.
I should note that I have not yet seen a fake overprint on the one and a half cent denomination, no doubt due to its low value.
The overprints were commonly faked. The amateur simply used a typewriter. The professional fake was a bit more advanced. Here are some clues to a stamp having a fake overprint.
The faint ridges seen horizontally across the gum are called gum breakers. They were applied by the Bureau in order to prevent the stamps curling. Sometimes they are so faint they can only be detected by running your finger over the gum. The gum breakers on the Kansas and Nebraska overprinted stamps are 22mm apart. Which means only one gum breaker, or two if the breakers are at the very top and bottom of the gum, should be present. The example above is NOT an overprint as the gum breakers because the gum breakers should be further apart.
The counterfeit stamp shown above has an incorrect typeface on the Nebr. overprint.
An obvious forgery, the overprint is both the wrong typeface and the letters are not aligned.