There is a tiny "Japan" ink stamped on one side of the orange box here, into which one five-sided die nests, and then the six sided one nests inside of that. Printed paper over folded card, I just thought--think-- they were curious and made quite a visually satisfying little set--and I can't find another quite like it out there, though Japanese origami paper dice are definitely a thing. 1920s-30s I believe.
Orange box measures 1 5/8" cubed. General wear as documented (shot with magnification) but they as pretty bright and crisp.
 
             
           
           
           
           
           
           
           
           
           
           
           
           
           
           
           
               
               
               
               
               
               
               
               
               
               
               
               
               
               
               
       
      