Holograph note on the weight of samples of copper coins
Novemb 1st 1700 A pound of old Tinn farthings made in tale 1s. 6d
Another pound of farthings made in tale 1s 1d
A pound of pewter half pence made in tale 1s 5d +
Another pound made 1s 5d
Another pound of Tin or pewter half pence made 1s 5 +
Several half pence little worn being pickt out (vizt 13 in number) of them weighed about 172 grains each & the other five about 160gr each, so that some of them seem to have been coyned at 17d to the pound weight & others at 18d to the pound weight. And one with another they make 17 to the pound weight or thereabouts. Of those which weighed 172gr, 6 were dated 1692 the other two 1690. The other five which were lighter were dated 1690 {illeg}les one of them were 1691 & another 1692, for the numbers were blind.
These half pence therefore seem first to have been coyned 18 & afterwards 17 to the pound weight Troy, or 21 & 20 to the pound weight Averdupois.
Source
MINT 19/2/328, National Archives, Kew, Richmond, Surrey, UKca. 1713, c. 186 words.