The issue numbers are not necessarily continuous as some titles were not released, or otherwise skipped. Nevertheless, the Blue Amberol format was the longest-lived cylinder record series employed by the Edison Company. These were designed to be played on an Amberola, a type of Edison machine specially designed for celluloid records that did not play older wax cylinders.
The issue numbers are not always sequential because some titles were not produced or skipped. Nonetheless, the Blue Amberol format was the most enduring series of cylinder records used by Edison Company. These were created to be played on an Amberola machine, a type of Edison device specifically designed for celluloid records that could not play older wax cylinders.