I'm looking at my 1st Gen. .44 Bulldog with a 2 1/2" barrel, marked on the left side with "BULLDOG .44 SPL", and on the right with "CHARTER ARMS CORP. BRIDGEPORT, CONN." Ser. No. is 2581xx. After having it 35+ years, the bluing is worn in places, the bore still looks good, and although it...