11,12,13. This deck certainly has a little extra. Apparently though, it’s for use in a card game called 500 (also named bid Euchre). A game for 2-6 players , not dissimilar to spades, where pairs of players bet how many tricks (points) they and their partner will win, without knowing what cards they have. This brings about very strategic betting strategies to inform the teammate of the strength of their cards. Tactics and memory win the day!
