If it's the zymurgy recipe I brewed it's also te same as an older byo recipe and is nothing at all like old Rasputin.
More like a strong brown ale. Not enough hops. Not bad but not old Rasputin.
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This is why I do not brew any "clone" recipes from BYO or Zymurgy for that matter.
Some are better than others. When BYO or Zymurgy work with the brewery on the recipe, those are pretty solid. Think the Pliny the Elder and Two Hearted recipes, among others. As for the Two Hearted recipes, most will have a Chico strain. You can grab some of the Bell's yeast from the bottles, and make a much closer beer. I have been doing that, and recently got a good pitch of that at an AHA rally. It made a tasty mild, and the next use will be for an Expediton Stout.
When it is a guess, well not so much.
As to Mark's original post - I found that 1450 was the North Coast Strain a few years back with a little time with Google.