DS, one page, 17 x 10.5, a poster-style printed copy of the “Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space,” bearing two postage stamps and a first-day cancellation, and boldly signed in black ink, “Rainier, Prince de Monaco” and “Grace de Monaco.” In fine condition, with bisecting vertical fold (evidently as issued). R&R COA.
