Very interesting. Note that the second serial number on the barrels is lower than the frame number. That doesn't make sense to me as I would expect it to be higher if returned for repairs or alteration after it left the factory.
Instead I would propose this is a second set of barrels that were fitted to the gun, perhaps at the time of purchase. See the upcoming newsletter (it went to press yesterday) concerning a C grade two barrel set of almost identical serial numbers.
Marks 21 is correct about last year's Las Vegas fiasco.
