Hmm... sorry, never heard of them and I even researched Heritage breeds back in the spring. That's not sayin' I didn't miss some info. I do know a lot of people tend to cross breeds to make up there own or bring one (that is extremely rare or extinct) back into production.
They are a real breed of heritage turkey, and were extremely rare back in 1998 according to an SPPA turkey census that Feathersite has on their website. The census only found one breeding pair, but that doesn't mean that was all there was then.