Unflown sterling silver STS-41-B Robbins medal, possibly a prototype, approximately 1.75˝ x 1.25˝, featuring a raised design of the mission insignia on the face. The reverse is engraved with the launch date, "Feb. 3, 1984," and landing date and location, "Feb. 11, 1984, RWY 15, KSC, FL." The medal lacks a serial number and is stamped with the Robbins hallmark on the edge. Condition is mint state. Accompanied by the original plastic box (without its stiff blue liner). From the collection of a former Robbins Company executive. STS-41-B included the first untethered spacewalks, accomplished by Bruce McCandless and Robert L. Stewart.