Well, I found a video featuring the original USPCC version of the Magic Castle deck. So that confirms the existence of 4 versions overall. It's a young Michael Ammar video. A good routine but he seemed quite nervous here.
http://www.youtube.com/watch?v=TEDzEwuJez4
The identifier was the Bicycle ace of spades, 3:07. Unfortunately the box is not seen in the video.
Nice Find! it reminds me of the vernon revelations series! so boring but so awesome at the same time!
That's exactly where the clip comes from - the YT descriptions states it.
How did you find that? wow.
So, as the box is not shown I have to buy it and then check out the ace.
But you say that cartamundi has only one castle. Don Boyer says it has 2 castles.
If you're talking CARD BACKS, the Cartamundi deck has two castles on the back.
If you're talking TUCK BOX, the Cartamundi deck has one castle on the front, one on the back.
The Paulson deck is the same, with a Paulson seal and "Hoyle-like" faces, while Cartamundi uses their own faces. It's not inconceivable that Paulson contracted with Hoyle for the printing of their deck. Hoyle was possibly still independent of USPC at the time the deck was made, though they might have been a subsidiary of Stancraft by then.
I couldn't clearly identify the backs on the deck Ammar used in the clip, nor could I see the Ace of Spades well - I had to watch on my phone and the clarity wasn't very high. But it seems to be USPC I, especially when you factor in how young Ammar is and the late-'70s/early-'80s fashions. The Magic Castle wasn't established until 1963 and at the time they were likely more interested in establishing the club and using the popular gaffs/decks of the time (a.k.a. those with Bicycle Rider Backs) than they were in creating a deck of their own. I know nothing of the history of the place, but it would seem to be a fair guess.
Note how he went out of his way to show the ladies how his deck was an ordinary deck? Custom cards such as those were only starting to become popular and he wanted to allay any suspicions his audience may have had. Prior to that he probably worked mostly with Bikes, Bees, Tally Ho, etc., perhaps some casino decks or airline decks (they were still making them poker-sized then - they didn't switch to bridge-sized until passenger plane seating starting becoming "bridge-sized"...
).