This is an unusual stencil airbrushed design. The pattern almost seems incomplete, yet it's glazed over and has a sample number under the glaze on the back.
Green triangles slightly brushed over are repeated around the edge of the white 8 3/4 inch plate.
Sample No. 375/80 is handwritten on the backstamp as is X14,059 plus the Mayer China mark.
Excellent condition with some stacking marks. Don't miss adding this sample plate to your collection.