Vintage AIRCO Cross Hinge Two-Tone Safety Glasses Sunglasses Frame only, without lenses. Two-tone glasses from the minor manufacturer AIRCO. This two-tone color is not often seen. These glasses have a more solid frame than Bausch & Lomb's cross hinge glasses. The size markings are slightly faded, but the item is generally in good condition. There are no issues with use, but please understand that this is a vintage item. Frame width: Approximately 142mm Frame height: Approximately 46mm Hinge to hinge: Approximately 132mm Lens width: 48 mm (marked) Lens height: 40mm Bridge: 22 mm (marked) Temples: 4 3/4−6 (marked) Please allow for some minor errors. American Optical Bausch & Lomb TART OPTICAL IMPERIAL OPTICAL US OPTICAL US Safety NORTON WILLSON CESCO