Goggle Glasses - Triplex Safety Glass Co; For Aviator's Goggles; Great Britain; circa 1915-1918; Aviator's goggle glasses made of Triplex safety glass. (Three pieces - two perfect and one shattered). Triplex glass was composed of two outer sheets of plate glass with a sheet of Xylonite (celluloid) sandwhiched between them and cemented together with a special transparent cement. Used from 1912-1930s for the windscreens of motor cars and aeroplanes; and for goggle glass for flying