I recently bought this matchbook from the estate of John L. Cronk.
Mahony was a short lived diner company, formed from the remains of O’Mahony.

This matchbook’s interesting in that it advertises not only the Mahony diner company and their Mahony Diner – Motel Center, but also the diner trade journal, Fountain Luncheonette and diner magazine of Rahway, NJ. The inside of the matchbook discusses the virtues of matchbooks as a form of diner advertising.
My other Mahony ephemera.

A Mahony Diner tag, made for a diner that was never built.

Unfortunately, other than its short lifespan and its relation to O’Mahony, I can’t seem to find all that much on the company. I’d love to know more.