I've been eyeing this set for a while and pulled the trigger the other day as I have never held a card in hand before. It is a late 1970s Tonton unopened taba bundle with 55 packs (50 regular + 5 bonus packs). I am assuming there are 5 winner packs randomly in the bundle so you would get a bonus pull if you pulled one of these winner packs...thus the 55 total packs. These cards are awesome in hand and the bundle is quite thick. The manufacturer is unknown, but likely one of the big companies from the late 1970s like Yamakatsu, Marusho, or Bull Mark. Each pack contains two game cards which are intended to be folded and used to play Tonton sumo. The likeness of each wrestler is used and their shikona is written on their mawashi along the middle. Tonton sumo is a tapping game where you place the pieces in front of each other and tap the table or playing board and the wrestlers move and push each other. The first piece to fall over is the loser. Each card is about 3 3/4" x 3 3/4" unfolded. I was particularly attracted to this bundle because it has the famous Takamiyama card attached to the front which was used to show kids and example of the card they could pull from the packs. I opened up one of the packs and folded the piece to show you what they look like. The arms can be folded into different positions as well to try and gain an advantage over your opponent. Good stuff!