x4 Vtg MCM Mid Century Modern Ceramic Oven Proof Shell Bowls Japan 6.5” x 6.5”

x4 Vtg MCM Mid Century Modern Ceramic Oven Proof Shell Bowls Japan 6.5” x 6.5” Vintage MCM Mid century modern set of 4 ceramic clam shell , seashell seafood chowder bowls / mini casserole dishes. Oven proof / oven safe, Made in Japan. Bowls are all marked ‘ Oven proof made in Japan on bottoms, it’s hard to make out the bottom on the black ones, however it is seen clearly on the bottom of the white ones. Excellent condition no chips cracks or crazing, pretty much mint condition! Includes set of 4 pictured, x3 black & one white. Bowls measure approx 6.5” x 6.5”