This is a truly vintage carabiner. It's a hollow carabiner manufactured by Salewa in West Germany before the reunification of East and West Germany in 1990, with "West Germany" stamped on it. The hollow carabiner was a lightweight carabiner developed by Salewa, a world first. It was used by Tsuneo Hasegawa during his solo first winter ascent of the North Face of the Grandes Jorasses in 1979, and he praised it highly. This led to Kajita, a Japanese company, producing similar products, making this a piece of climbing history. However, it was later discovered that the hollow design led to a decrease in strength due to internal corrosion, and production was discontinued. It is no longer in use today. It's no longer something you can easily find, and it's a carabiner that deserves a place in the history of climbing equipment, perhaps even in a museum. For those who appreciate its value, what do you think? Thank you. #carabiner #climbing #vintage #antique #mountain #TsuneoHasegawa