It might be good to add the standard weight of 11 13/25 grains to this coin. The earlier .750 silver 3 cents weighed 12 3/8 grains, the later cupro-nickel 3 cents weighed 30 grains.
Former Numista referee for banknotes from Ireland, Northern Ireland, Scotland, Wales and Saint Helena.
I couldn't find any direct link to the weight in grains for these coins. The Red Book lists weight in grains for all the coins in this time period except the four 3 cent types.If you're sure of your numbers I could add a line in the comment section saying, "The three-cent pieces, called the trime by the Treasury Department, was first authorized by Congress on March 3, 1851. The weights of the silver three-cent pieces were specified as 12 3/8 grains (.80 grams, KM #75) and 11 13/25 grains (.75 grams, KM# 80 and KM# 88)."
Sorry, I should have cited my source, namely the 1979 edition of SCWC. Later editions don't have as much detail about the US coins. If you do the maths, the first is weight related to the other silver coins in production in 1851 but struck in lower grade silver, the later issues are weight related to the other minor silver coins but not the dollar (whose weight stayed was not changed in 1853).
Former Numista referee for banknotes from Ireland, Northern Ireland, Scotland, Wales and Saint Helena.
