This release, Swing Trumpets: Roy Eldridge & Charlie Shavers, represents sessions recorded for the World Broadcasting System (WBS), including previously unissued alternate takes.WBS was a transcription company created in the early years of commercial radio that provided popular contemporary music programming on 16" discs to subscribing radio stations. These nationally syndicated music broadcasts were not commercially available to the public and are unique in this regard.The George H. Buck Jazz Foundation formally purchased the World Broadcast Service company in 1969. This historic collection was sourced from existing 16" Acetates, Test Pressings, and World Subscription Discs, and has been beautifully restored. The release is a must for any collection of swing era vocal groups.