APOLLO–SOYUZ — 50TH ANNIVERSARY COVER SIGNED BY THE INTERNATIONAL SPACE STATION CREW July 15, 2025 — Fifty Years After the Historic Apollo–Soyuz Launch An exceptional commemorative cover marking the 50th anniversary of the Apollo–Soyuz Test Project, signed by the seven astronauts and cosmonauts serving aboard the International Space Station on the anniversary date: Sergey Ryzhikov — Roscosmos Aleksey Zubritskiy — Roscosmos Jonny Kim — NASA Anne McClain — NASA Nichole Ayers — NASA Takuya Onishi — JAXA Kirill Peskov — Roscosmos Dated July 15, 2025, precisely fifty years after the simultaneous American and Soviet ventures that began one of the most consequential missions in the history of human spaceflight. What makes this cover particularly significant is the remarkable historical connection between its subject and its signatories: Apollo–Soyuz represented the beginning of international cooperation in human spaceflight; fifty years later, the astronauts and cosmonauts signing this cover were themselves living and working together aboard the International Space Station — the ultimate realization of that concept. THE HANDSHAKE THAT CHANGED SPACEFLIGHT On July 15, 1975, at the height of the Cold War, two spacecraft launched from opposite sides of the world. From Baikonur Cosmodrome, Soviet cosmonauts Alexei Leonov and Valery Kubasov departed aboard Soyuz 19. Hours later, an American Apollo spacecraft lifted off from Kennedy Space Center carrying astronauts Thomas Stafford, Vance Brand and Donald “Deke” Slayton. Two days later, on July 17, Apollo and Soyuz rendezvoused and docked in Earth orbit. When Stafford and Leonov opened the hatches and exchanged their famous “handshake in space,” the moment became one of the enduring symbols of détente between the United States and Soviet Union. For nations that had spent the preceding decade competing intensely for supremacy in space, Apollo–Soyuz demonstrated something fundamentally different: that spacecraft, engineers and crews developed on opposite sides of the Cold War could work together successfully in orbit. The mission was the first international human spaceflight partnership and established experience that would eventually contribute to later U.S.–Russian cooperation, including Shuttle–Mir and ultimately the International Space Station. 1975–2025 — FROM APOLLO–SOYUZ TO THE INTERNATIONAL SPACE STATION The significance of this particular cover extends considerably beyond a conventional anniversary commemoration. Exactly fifty years after Apollo and Soyuz launched, the International Space Station was orbiting Earth with an international crew that included astronauts and cosmonauts from the United States, Russia and Japan. On July 15, 2025, the seven signatories represented the operational reality of the principle first demonstrated so dramatically by Apollo–Soyuz half a century earlier: international crews living, conducting scientific research and operating spacecraft together in orbit. The signatures therefore create an extraordinary connection between two generations of international human spaceflight. In 1975, Stafford, Brand and Slayton represented the United States while Leonov and Kubasov represented the Soviet Union. Fifty years later, this cover brings together: NASA: Jonny Kim, Anne McClain and Nichole Ayers Roscosmos: Sergey Ryzhikov, Aleksey Zubritskiy and Kirill Peskov JAXA: Takuya Onishi Rather than merely commemorating history, these seven spacefarers were themselves participants in the international spaceflight partnership that Apollo–Soyuz helped make possible. COLLECTOR SIGNIFICANCE For the specialist collector, the appeal of this cover lies in the unusual convergence of date, subject and signatures. Apollo–Soyuz commemorative material is an established field within space philately and astronaut autograph collecting. Likewise, multi-signed International Space Station material is highly desirable because it documents particular expedition crews and periods aboard the orbital complex. The present cover combines both themes. Its date — 15 July 2025 — marks exactly half a century since the Apollo–Soyuz launches. Its subject commemorates the mission widely regarded as the symbolic beginning of U.S.–Soviet cooperation in human spaceflight. And its seven signatures represent the international crew actually aboard mankind’s permanently inhabited orbital laboratory on that anniversary. This creates an unusually appropriate “then and now” artifact of international space exploration. FROM COLD WAR RIVALS TO PARTNERS IN ORBIT In 1975, the concept of American astronauts and Soviet cosmonauts docking their spacecraft and working together was extraordinary. Apollo–Soyuz lasted only days, but its symbolism proved far more enduring. The cooperation pioneered during the mission developed over subsequent decades into increasingly ambitious joint programs. By the twenty-first century, multinational crews routinely lived and worked together aboard the International Space Station for months at a time. The contrast is striking: 1975 — two rival superpowers meet experimentally in orbit. 2025 — astronauts and cosmonauts from multiple nations routinely share a permanent laboratory in space. Few commemorative pieces illustrate that progression as directly as a 50th-anniversary Apollo–Soyuz cover bearing the signatures of an international ISS crew serving together on the anniversary itself. AN OUTSTANDING ANNIVERSARY ASSOCIATION PIECE This is more than a cover commemorating the fiftieth anniversary of a historic mission. It forms a tangible bridge between the first great experiment in international human spaceflight and the international partnership that followed from it. From Stafford and Leonov’s handshake in 1975 to American, Russian and Japanese spacefarers working side by side aboard the ISS fifty years later, the piece encapsulates half a century of cooperation in orbit. APOLLO–SOYUZ 15 JULY 1975 — 15 JULY 2025 50 years of international human spaceflight Signed by all seven astronauts and cosmonauts serving aboard the International Space Station on the anniversary date. A particularly evocative and historically appropriate piece for the advanced collector of Apollo–Soyuz, International Space Station, astronaut autograph and international spaceflight memorabilia.