This listing is for a nice little Antique (c early 1900s) Wooden Cased Set of Ten, M1 Class, Calibration Weights / Test Weights, Ranging from 2mg up to 500mg. They are presented in an old-school pencil box type sliding top wooden case, which is 12cm wide x 4.7cm deep, it has a multi sectioned interior to hold the ten individual weights, and a sliding top, with a card gasket. There is a cut-out section on its lid to hold a pair of fine tweezers, it has a red felt under pad, and the slider is marked ''R Cuddeford'' which I would imagine was the name of the original owner. The set is in great condition, and would make a nice addition to any collection of vintage precision instruments.