These Uncatalogued Round Baseball Menko Cards were made in 1949.
This set/group of Starburst design cards are all Catalogued under JRM 2 in the Japanese Baseball Card Catalog.
There are many variations and sizes within the JRM 2 group.
This variation is one of 3 different that are 1-7/8" in size, and not mentioned in Catalog.
The image is heavily cropped to show only the head and face close-up, and they have a yellow overall look to them.
These Close-Up Portrait variation cards are fairly Rare overall.
They would probably be ranked as R4,
meaning est. under 10 of ea. card known.
Kaoru Betto 別当 薫
is in the Japanese Baseball Hall of Fame
Betto was a player from 1948-1957, 1950 MVP
He was also a manager from 1952-1973
'The DUDE' in the movie 'The Big Lebowski' wore a Kaoru Betto shirt in movie.
*image showing the 3 variations in 1-7/8" cards is for reference only.
Great for the 'type card collector', or Japanese Card collector....