Fitted with a No. 2M 50mm disc in 0.01mm increments. Includes friction thimble and lock nut as described on the box's label. Marked 'CARBIDE' on the outside of the box.
Interesting origins—the body of the micrometer reads 'THE L. S. STARRETT CO. LTD. GREAT BRITAIN' with the box and internal packing memo marked from Jedburgh, Scotland. Includes an extra No. 2MD 25mm in its original paper sleeve from Athol, MA. in the USA.