Calibrated Micrometer Appraisal

Vintage Outside Micrometer Set with Case

This is a vintage outside micrometer set, likely from the mid-20th century, presented in its original fitted case. The primary component is an outside micrometer, characterized by its "C" shaped frame, which appears to be made of black-painted cast iron or steel, showing some wear and chipping of the paint, revealing the metal underneath. The thimble and sleeve of the micrometer are silver-toned, likely chrome-plated or satin-chrome finished steel, with knurled sections for grip. The markings on the sleeve are partially visible, suggesting a measurement range. The set includes at least one interchangeable anvil or standard, designed to extend the measuring range of the micrometer, identifiable by its cylindrical shape and a knurled holding shaft. Another component appears to be an adjustment wrench or a special fixture, possibly for calibrating the micrometer, which is a flat, grey metallic piece with a central V-notch and multiple small holes around its perimeter. The interior of the case is lined with red velvet-like material on the bottom, which is stained and discolored, and black foam on the lid, indicating functional but aged padding. The case itself is a simple metallic box with a hinged lid, showing signs of external wear and possibly some minor tarnishing on the metal edges. The overall condition suggests that this tool has been used but maintained, with the wear consistent with a working instrument rather than a display piece. The craftsmanship appears to be industrial-grade, built for durability and precision.