Not to be confused with Hazel Atlas' Optic ribbed bowlthis is a 1940's Bartlett Collins' CLEAR OPTIC RIBBED BOWL WITH SQUARED BASE AND RED, WHITE AND BLUE STRIPES This is a vintage Bartlett-collins clear optic ribbed Bowl 2 quart with rim and red, white and blue stripes and squared base. Ribbed on the outside, smooth on the inside. Made in the USA. Measures 9.875" diameter x 4.75" high and 3" squared base. Excellent condition, no chips, cracks or scratches. very light sear to the stripes. Weighs 2 pounds 14 oz.