Figure 11. Japanese Type 5 ‘Dust Proof Glasses’. The earliest versions appear to have been leather and nickel plate/chrome; later versions leatherette (fake-leather) and finally plain, but fine quality canvas, these later ones had non-reflective paint. Middle left; a 1930’s leatherette and chrome pair, (middle right) leatherette, but with painted frames, late 1930’s early WWII? (Bottom). The War-time version, light khaki canvas face mask, khaki painted frames. Note; metal mortise hinges on all.