All items that have gone through the mails can have creases, corner wear, marking and other evidence of same.  These are normal & should be expected.  All items are original & authentic, unless stated.   

Definitions: 

PC-Post Card or Postal Card

PPC-Picture Post Card

RPPC-Real Picture Post Card

The Size is usually 3.5" x 5.5"

PSE-Postal Stationery Entire & is the Preprinted Government Stamped Envelope.