This 12 CD box features Culshaw recordings from "The Early Years" (1948-55), when Culshaw was finding his footing as a producer and participating in the technological revolutions (the birth of the LP, primarily, the advent of stereo) that he would exploit so effectively later in his career. Have a look at the video for a discussion of the set's contents. There's some very interesting stuff here, including Solti's first (1955) recording of the Brahms German Requiem.