Swing Little Glow Worm / The Poor People Of Paris

'This release is from the Stereo Seven releases, here is a short history of this type of release: August 1959 Columbia revives the 7-inch 33 1/3 rpm format for their new Columbia Stereo Seven singles. Selected popular items are issued in this series until May 1960, after which they are issued only in boxed sets for DJ's as a breakdown of album tracks. These sets are numbered JS7.1 to JS7.85, the last being issued in February 1964.

My guess is that the JB at the end of the catalog
number on the labels stands for Juke Box.'[discogs]