I'm still cleaning my basement and finding all sorts of things.

After doing some research I found this:

John Hancock, 10-Cent "Domestic Rate" Postcard, Issued 19 May 1978 U.S. Scott #UX 74.

If you look at the bottom left front of the postcard you'll see '@USPS 1978

Unused, clean

To save you money on shipping this will be sent in a white #10 envelope.

Please look at the photos since they are definitely also part of the description and show the exact item you will receive.