B&W close-up image of Norden Bombsight cabinet with cover removed. There is a ruler for scale. Identification label " Quadri Corporation Pheonix, Arizona Title O32/MP 32Kx18bitMemory M2-MJ11-BM PN 1109D00851-101 Ser 231 NORDEN SYSTEMS ,Subsidiary of United Technologies" "
Ruler for scale.