Caribe Saucers (3) China Restaurant Ware 6” White with Green Stripes

This is a set of 3 vintage Caribe China Restaurant Ware 6" saucers made in USA. They have green stripes & a ring in the middle for a cup or soup bowl. All marked Caribe backstamp in dark green w/ an M followed by a number, which is hard to decipher. The M stands for 1960. The numbers 1, 2, 3 & 4 refer to the months Jan. thru Dec. All have 3 spots in identical places on the undersides of the saucers where the glaze is missing. Free of chips & cracks.There are oval platters & a pitcher for sale. Please excuse the shadows on the photos on the back of the plates.