Two 'Superrench' chrome molybdenum open ended spanners made of non sparking material for use in inflamable environments;one size 1/4"x 5/16"type w2025,one size 1/4" x 5/16" straight type model w 1025,made by Williams of U.S.A. Two general purpose open ended forged spanners 3/8"x1/2" and 3/4"x7/8" stamped Buck and Hickman and a Williams wrought steel open ended straight spanner3/8"x7/16" Two 'Superrench' chrome molybdenum open ended spanners made of non sparking material
Three spanners, for Elford filter assemblies, used at the Common Cold Research Unit in the separation of different size viruses Three spanners
