Card Identification Forum

So I realize this is a real toughie.  If my buddy and SCD coumnist Dan Even doesn't know the origin of this card, then chances are, few do.  I picked this up from him because I admired Gary Carter and because I have never seen a card like it- the photo was taken at Candlestick Park, probably between 1976-80, when Carter's hair was longer and before he permed it up.  It is not by JD McCarthy or any of the Chicago-based photographers.  The card is a litho stock, rather than a photo stock.  Any Gary Carter fanatics out there who could shed some light on this one? 

 Is this a standard postcard size?    And can you explain the difference between litho and photo stock or would a person have to see both to tell the difference?   Thanks

It is standard postcard size.   A photo stock has a higher gloss to it- much like an old time photograph- a litho is less glossy and cheaper to produce.