Grandma's Oliver Chocolate

[smithmal]

I keep seeing this variety pop up regarding its fabulous flavor and production. What is the history with this variety? Is it stable? I've read there is also a "Marsha" strain but not sure what that means. I read through Marsha's recent winter growing thread in which she grew this variety. Is the Marsha strain any different then what is sold at various vendors? Also what is a good seed source for GOC?

Thanks!