Micro-hardness tester accessory for a Vickers M55 microscope made by Vickers Instruments Ltd, York, England, probable date 1965-1974, comprising transmitter no. M06628, triple objective lens turret fitted with micro-indenter no. K886 and Vickers M.H.T. objective no. N1702 (one socket empty), 10X centring micrometer eyepiece, reference sample marked 'stainless steel / squares = 0.1MM', a cable and four other parts, all in a fitted plywood case with handle, locking clips and two keys. Micro-hardness tester accessory for a Vickers M55 microscope made by Vickers Instruments Ltd 1965-1974 (estimated)