Interesting to me anyway. Found standard blue Bees in a Great Mogul box. 1972. I had not seen this plain "Extra Joker" until now.
Given that Great Mogul boxes usually contain USPC seconds or decks for export -- would either of these be the reason for the plain extra joker? It means this deck carries no guarantee card. And it appears just fine -- no obvious defects, etc.
One color printing makes this card cheaper to produce -- and appear as an afterthought compared to the colored joker.
Found the deck at the Chicago Playing Card Collectors convention Thursday. Tons of free singles to swap, and you'll find rarer singles and interesting decks for sale. (CPCC member here).
Holiday Inn North Shore, Skokie, Illinois through Saturday evening.
Chris Turner
aka Andrew
52 Plus Joker and CPCC member for 20+ years.