Vintage Zuni Polychrome Bowl with Spirit Line Signed

Experience the rich history of Native American pottery with this vintage mid century Zuni polychrome bowl. Each piece, coil built with intricate designs, tells a story of culture and tradition. The addition of a spirit line and signature makes this bowl a valuable and unique addition to any collection.

The bottom of the bowl is signed. It is difficult to read but I believe it says Frank Keystone. There is additional writing but I have been unable to decipher it. 

It measures 5.5” in diameter. 
Height is 2”. 

There is a fair amount of wear and discoloration to the bowl including 3 chips along the rim. The white slip exhibits craquelure which is typical of pottery of this age.