MAx,

Many of the guns serial numbers do not exactly coorelate to the dates in textbooks, as they may have sat in "stock" for some time. If you have the ledger, this is the most accurate reference. At 8.1 lbs. your gun sure does sound like a magnum. With that extra set of barrels and all, you probably need to sell it as it takes up a bunch more space.....Anytime!!

John