Screw Gauge Appraisal

Starrett Outside Micrometer with Case

The item is a micrometer, specifically appearing to be an outside micrometer, housed within its protective case. The micrometer itself is constructed primarily of metal, likely steel or a similar alloy, given its typical application for precise measurements. It features a "C" shaped frame, a thimble with finely marked graduations, and an anvil and spindle for gripping the object to be measured. The visible surfaces are a matte silver-gray, indicating a natural metal finish or a protective coating. There is a clear Starrett manufacturing mark visible on the outside of the red case, suggesting a brand known for quality precision tools. The overall condition appears used, with some visible dust and grime within the case, and possibly light surface wear on the micrometer itself, consistent with workshop use. There are no obvious signs of significant damage such as deep scratches, rust, or deformation, which is crucial for a measuring instrument. The thimble and sleeve have clearly etched or engraved markings for measurement. The design appears to be a standard industrial-grade micrometer, likely from the mid to late 20th century given the traditional design and branding. The craftsmanship appears to be robust, designed for accuracy and durability in a professional or hobbyist setting. The black hinged plastic or hard rubber case with a red lining provides good protection for the instrument.