I've got an obsession with old hammer doubles. None are as nice as yours and all are domestic and many are 10 gauge. I have an LC Smith Syracuse 10 gauge, a Colt 1878 12 gauge, Colt 1878 10 gauge in higher grade, Remington 1889 12 and 10, Remington and Sons 1882 10, Baker Syracuse 10 gauge and several others.