Label color and text - Columbia Records:.In 1972, flipback covers were changed to two flaps (top and bottom only), then eventually phased out in 1974. From the late 1960s through December 1971, these flipback covers had three flaps (top, right side, and bottom). Flipback Covers: In the late 1960s and early 1970s, single cover Pink Floyd records were issued with "flipback covers." These flipback covers had flaps that wrapped around the sides of the cover, and attached (on the outside) to the back cover.Catalog Numbers: Catalog numbers are the letters and numbers assigned to a particular record, and can be found printed on the cover, label, and matrix of a record.Bar codes: Bar codes on album covers made their appearance in the early 1980s, in apx.Harvest Records (EMI 100 - The Vinyl Collection).