Flown Gemini 11 embroidered mission patch, measuring 4.25″ long, signed on the reverse in black ink by Charles Conrad. Accompanied by a handwritten letter of authenticity from Conrad which states “This Gemini XI patch flew aboard Gemini XI during the period 12 to 15 September, 1966. Charles Conrad, Jr. Cdr. Gemini XI.” In fine condition. Flown items from the Gemini missions are uncommon. RRAuction COA.