HI, I M A RETIRED PLAYER AND COLLECTOR OF B.L. PICKUPS, I FIND TO TO BE SOME OF THE BEST !  BUT I FIND VERY LITTLE INFO OUT THERE ON L-220 AND L 220T MODELS. THEY ARE CREAM COLORED, EPOXY FILLED, AND HAVE A CURVED BLADE . THEY HAVE  3 SUPER THIN LEAD WIRES RED, BLACK AND BARE (GROUND) RED IS HOT AND THE BLACK AND BARE GROUND OUT TOGETHER. THEY WERE MARKETED UNDER ..LAWRENCE SOUND RESEARCH, INC. NASHVILLE TENN. AS THE BILL LAWRENCE HUMBUCKING BLADE  L220 FOR STRAT AND L220T FOR TELE. THEY ARE ETCHED UNDER THE FRONT BLADE "LAWRENCE" WHICH IS BARELY VISIBLE. THEY USUALLY COME IN BETWEEN 10.6K AND 10.8K. THEY ARE CRISP AND CLEAN SOUNDING AND HAVE A FANTASTIC TONE.  PLEASE USE THIS INFO IN YOU SITE SINCE YOU DONT SEEM TO HAVE ANY INFO ON THEM.  MY BIG QUESTION IS WHAT YEARS WHERE THE CREAM MODELS PRODUCED ? I WOULD GUESS IN THE 1970''S ???, ANYMORE INFO ON THESE  WOULD BE GREAT.  ALSO, THEY WERE SOLD IN ROUND PLASTIC  CONTAINERS WITH  ORANGE SCRIPT FOR THE STRAT AND BLUE SCRIPT FOR THE TELE'S.. PHOTO'S AVAILABLE UPON REQUEST, THANKS, NICK