Cute as bugs!
Each oil painting measures 3.5 by 5.5 inches.
Artist's studio stamp on reverse backings.
This pair dates from the 1920s by well listed California artist
G Yoichi Serisawa (1874-1927). Housed in their incredible little
pie crust frames with some wear and corner damage.
Mismatch later easels are included.
 
395 for the pair
 
Below is from Askart
 
G. Yoichi Serisawa (1874 - 1927) was active/lived in California / Japan.  G Serisawa is known for Commercial Art.

G. Yoichi Serisawa was born in Shizuoka, Japan in 1874.  Serisawa studied at the Tokyo Imperial Art Academy under Hashimoto Gaho.  He immigrated to Seattle, WA in 1918 and, with his family, moved to southern California in 1921.  Settling in Long Beach, he worked in commercial art until his death of lung cancer on July 13, 1927.  He was the father of artist Sueo Serisawa.

Source: Edan Hughes, "Artists in California, 1786-1940"
Interview with the artist or his/her family; Census.