Here are two covers that i just got in. The first one is a cover send to Indiana. Has the CP27 var1 with a stamped date of OCT 24 1947. The 2nd cover is send to Illinois. Has CP6 Registration and CP42 with star. I have started a collection of regular postally used covers. Anyone have anymore covers to add.
Are you looking for commercially used covers? If so, I am sure there are a bunch of those addressed to National Bellas Hess, Montgomery Wards and Sears. I will look to see if I have anything interesting.
Here is a commercial cover with what looks like CP29 from Greenville?
In the mean time, if I can successfully upload the file, I'll share two non-philatelic covers. The first is from a missionary in GANTA (CP 29 Nov 27) via MONROVIA (CP 26 backstamp Dec 5) to a Bishop in NYC.
The other cover containing a Christmas card was sent from HARPER (CP 26 Dec 16) to a friend in Boulder Colorado.