Discover a remarkable collection of three vintage material testing instruments, each approximately 5 x 5 1/2 x 2 1/2 inches and encased in their original cases. This unique set includes: 1) Käfer Dial Thickness Gauge, in excellent condition with a clean dial and intact wood handle, though the cardboard box shows some shelf wear and dirt. 2) Louis Schopper Leipzig Paper Basis Weight Scale, with significant cosmetic wear but still legible markings; the worn case adds to its antique charm. 3) The Ashcroft Paper Tester (Bursting Strength), exhibiting light surface scratches yet maintaining a clean dial, though the case has noticeable wear. Perfect for collectors or enthusiasts of industrial history!