By Bboys6969, 6 June, 2019 Description Approximately 1950s prism Warehouse lighting glasses stamped Halophane Category Other Medium Steel and glass Distinguishing marks Halophane stamped on the bottom rim along with the four digit number Condition Good Size and dimensions of this item Glass is just over 10 in complete unit is just under one foot Date Period 1950ish Weight How about 4 or 5 lb History Unknown For Sale? Yes Photos Log in or register to post comments