I received a cute mihon or sample pattern juban, all in shades of blue. The silk fabric shows a textile manufacturer's many patterns and colors on one bolt of fabric; so this is not a patchwork, it's made from one bolt.
For kimono-newbies, a juban is an under-kimono, basically underwear, worn under a kimono just like a full slip is worn under a western-style dress. Mihon juban are always more expensive than regular solid color juban of the same era. This one is probably mid-Showa. New juban are usually fairly plain and in pastel colors, so this will be fun to coordinate with various kimono.