S.S. Dlophin is an unlisted chip in the S/L Wet-Chips Guide. That guide indicates Dolphin Cruise Line ('84-'97) and merged with Premier and Seawind Cruise Line to become Premier Cruises. (I suspect that John Long will hit you up for that chip.)

BR and JLA are "unknown".

Pleasurama, Grosvenor and County are England.

Jim