Bobbin insulators; Crown Lynn Technical Ceramics Limited; 1930-1965; 2009.1.1292.1-5
Bobbin insulators; Crown Lynn Technical Ceramics Limited; 1930-1965; 2009.1.1292.1-5
Bobbin insulators; Crown Lynn Technical Ceramics Limited; 1930-1965; 2009.1.1292.1-5