Posted by Tom Garver on October 2, 2016, 6:17 pm, in reply to "Re: Grade 3??"
Rick, briefly, according to Dr. Jim's book, there were 233 guns from SN 30034 to 37597 that had the designation of XX or XXX. The x's were stamped on the bottom side of the barrels just forward of the barrel flats. These guns left the factory without a grade designation or they were made into a different grade. Jim's book is a great reference guide and well worth the money if you don't have one