Thomas Styring & Son Ltd
Europe: United Kingdom, England, South Yorkshire, Sheffield
Early-Mid 20th c.
lens: 40 mm; envelope: 53 x 53 mm
Crookes tint lens in supplier's paper envelope printed with black border enclosing handwritten lens details. Crookes glass: +2.50 A shade.
Gift of Dr S. Kassam, FCOptom, 2006