Coin silver fiddlethread dessert set for 12

Made by Ball, Tompkins & Black, NYC, c1845 -- consists of 12 forks, 7" in length, and 11 knives with silver blades, 8-1/4" long (still looking for that elusive 12th knife). They all have hollow handles and have an old English mono M D on their handles. Total weight is 49 Troy oz. Condition is quite good, with the handles having the usual dings, nothing serious.