Vtg 'Hedgehog' Magnifier/Brevete SGDG T4 in Case

Vtg Brevete SGDG T4 'Hedgehog' Magnifier in Case Collector's condition. Vintage Brevete SGDG T4 'Hedgehog' Magnifier in original Case. Magnifier stands on feet with a non-spherical curvature to reduce image distortion over a larger area than a normal lens-based magnifier. The feet do not impede vision when held to read. Acrylic plastic material. Hoffritz was a specialty retail chain that sold various items. Brevete SGDG was a French type of patent that ceased to exist in 1968. 3 7/8"L x 2.75"W x 1.75"D Wt. in case 6.6 oz. Made in France