Horizon Blue was introduced 1969 to commemorate the successful moon landing of Apollo 11 in July of 1969. Manufactured dates 1969 to 1972. Designer Robert Gibson. Horizon Blue was initially produced as a relatively small collection and included Cinderella Bowl set (400). This listing is for a set of 2 vintage Pyrex nesting mixing bowls: 401 (1 1/2 Pints) and 403 (2 1/2 Quarts) This collection is in excellent condition with lots of luster. Set is $45. Fcfs. Xposted. Located in Qualicum.