Jay-Jim: I think you are likely correct that it is a single piece third class item.
I have scanned some items from my third class collections, and trust the links go ok. I have a feeling the scans are not going to be crisp. What dpi and size do others scan for posting here. Mine are at 72, 100%.
Undated post card with 3 precancelled halves, lacking appropriate PL&R endorsement, likely in the 1-1/2c third class bulk rate which started in 1952. The 2-cent post card rate became effective at the same time. Love the furniture.
Short-paid single piecewith half-cent postage due stamp, Baltimore roller precancel affixed. Evidence of another stamp once affixed at LL corner. That is how a half cent postage due was paid, recipient paid 1 cent and got an extra half-cent due stamp.
A href=http://www.postalhysteria.net/halfcentprexies/sand.jpg>Mailing tag with bag of sand attached advertising promotion done by gasoline company. Other side is cartoon of Ponce de Leon and Florida sand. Third class single piece.
Sherwin-Williams booklet half cent and 1c Prexies, 2 diff Lawrence Kansas precancels, late use of SEC 562 bulk rate endorsement.
2 uprated precancelled PSEs SEC 34.66 bulk rate endorsements.
Ham advertisingPair precancelled half-cents, Sec 562 bulk rate endorsement.
Aviation NewsPair precancelled half-cents, Sec 562 bulk rate endorsement.
Camera & photography advertisingPair precancelled half-cents, Sec 562 bulk rate endorsement.
Thats it. I really like finding with the contents, a slice of American pie over the years. Getting uptite with all this code, hope it works.