I cannot help you other than to suggest calling NAAG directly with the question. I am sure it would take all of about 3 minutes for one of their techs to look it up. www.beararch.com is the url.
I did not think the code was that old....I was guessing around '98 or '99 if memory serves me. I think that particular version had around a 290 IBO rating and a 225 AMO rating.