I know, these were produced in the mid eighties, and don't really belong on this blog. Celestion continued to produce seventies quality speakers, and the DL line was (and continues to be) popular.
They are large 3 way 10 inch rear ported systems with an excellent aluminum dome tweeter, a variant of the one developed for the fabulous SL-6S. The drivers have cast metal frames (not stamped) and rubber surrounds. They use much better speaker wire connectors than the Ditton line, and have the beautiful musicality that makes Ditton 15s, 44s, 22s et al so appreciated today.