I can not make out the signature on the bottom
See photos of the signature

Unique Studio Art Pottery Piece
Square Ceramic Lidded Box
Blue , White , Turquoise Colors
Bottom and Rims are Unglazed
Debossed Design on All Sides and Top

7 3/8 inches tall
3 1/2 x 3 1/2 inch bottom base

Small chip / knick on corner edge of lid
No cracks

See all pictures.