The iconic Butterprint pattern (1957-1968), often seen called Amish, Early American, or Americana, even though other Pyrex patterns were officially named the last two. Merged in 1963 with turquoise Snowflake pieces to create the Turquoise collection, which doesn't seem to make much sense until you take into consideration neither pattern had any shapes in common. Multitone Blue bowls and solid blue oval casseroles briefly rounded out the collection in 1967 before they and the Snowflake pieces were dropped, leaving only Butterprint pieces remaining as Turquoise through 1968.