A friend of mine spotted some Michter's 10 year rye at a reasonable price. One has a barrel number on it and the other doesn't.

I recall hearing something about how maybe they changed the juice that they put in during a later bottling. But I had always assumed it was all from Bernheim rye stocks.

Does anyone know if that's true and there's a specific set of barrels I should look for with the "good stuff"?