"The date must have been added before the card was signed. I don’t think there’s any way to know which card it is. It could even be on the back of one of the cards with Pete Best, or one of their individual promo cards."
"Fab, I don't know photo card release dates, but the photos in the first 2 cards were reportedly taken in Sept.1962, and the third was reportedly taken in Jan. 1963. "July 1962" is written on the cards so we need to look earlier."