As if by Magic

Pick a card, any card -----
 Without  looking, these are L to R,Two of Spades, Ace, and Joker. This conjurer's card pack belonged to my father and is showing it's age which must be around 100. When I was aboiut ten years old he taught me the code and I can still remember it, but I can't remember where I've just  put my glasses.
Thanks to Dfb24 for this month's  Tiny Tuesdays