When was the last time there was a pipe ad in a mainstream magazine? Certainly no later than the Ford Administration. No? By mainstream, I'm counting second tier mass marketed niche things you would find on a newsstand in Grand Central Station or at an airport, so Field & Stream would count.
How late did pipe companies advertise in Playboy or Esquire? Into the 80s? I don't remember, but I didn't have my hands on them all that often.