1300L -80/20 Bronze Wound, Lights for 12 String Guitars Gauges 010/.010, .014/.014, .023w/010 .030w/.012, .039w/.018, .047w/.027W John Pearse was a prolific folk guitarist in Britain who for years had a television show on BBC 2 teaching and playing guitar. In 1965 John Pearse began his collaboration with British Music Strings, a London string maker, to develop a guitar string with both a longer life and a more accurate vibrating and nodal pattern.