Google reminds me that 5 years ago today I was at the NYPL's exhibition, "Love & Resistance: Stonewall at 50" — this Mattachine Society poster was my favorite piece, for obvious reasons
I buy all my machines from Mattachine.
But seriously the federal government officially wouldn't employ gay people when this advert was printed, not until 1975. And homosexuality was still a mental illness in DSM until 1973.