Complex sentence: The Little Nipper series was an RCA Victor series showcasing their seven inch 45-RPM records in the 1950's, a variation on the Nipper the dog trademark seen on RCA 78-RPM records and on their 33 1/3 LP's.
Split into simpler sentences: The Little Nipper series was an RCA Victor series showcasing their seven inch 45-RPM records. First issued in the 1950's, the name was a variation on the Nipper the dog trademark seen on RCA 78-RPM records and on their 33 1/3 LP's.