Lambda symbol, gay pride pendant. "The first gay-oriented TV commercial ever run anywhere in the world," according to Deacon Maccubbin, of Lambda Rising Bookstore, was in 1975 and showed gays and lesbians wearing jewelry with lambda motifs during an episode of Marcus Welby M.D. A voice-over explained the insignia was the international symbol for gay rights. Maccubbin said, no known copy of the ad exists. http://www.adrespect.org/common/adlibrary/adlibrarydetails.cfm?QID=586&ClientID=11064
Lambda- Sterling Silver Bracelet: THE LAMBDA SYMBOL: is a symbol of both “Liberation” and “Unity”. In 1974, the Lambda was officially declared the international symbol for gay and lesbian rights by the International Gay Rights Congress. In chemistry and physics, lambda indicates energy in equations. It is often used to represent differing wavelengths of certain types of energy, reflective perhaps of the differing sexual energies between heterosexual and homosexual interactions.