Holograph notes on the output and costs of various individual operations (e.g. pressing, stamping, milling) at the Mint
Ten mills working 20 hours pr diem sufficed for coining 960000li per week in shillings & therefore two mills working 10 hours per diem suffice for coining 9000 per week & 1699600li per diem that is 3{illeg}0000 pieces, & so many half pence {illeg} amount to {illeg}833lwt of copper per diem. And if the copper go but twice through the Mills the two mills will sufice for coyning 12{illeg}50℔ per diem
A Press strikes 54 times a minute & therefore by continual working coins 90lwt in an hour & {illeg}405li in 4 hours. The rest of ye day is allowed for setting right the Presses Dyes & carrying the blanks & money to & fro. A moneyer & 4 labourers come to 14s per day that is d = d.
A Cutter makes 60 blanks in 500li of half penny blanks in a day. And two Mills two shilling Cu half penny cutters & twoone farthing cutter make 12{illeg}50l{illeg}wt of Blanks per diem, By the help of one Moneyer one at 6s onetwo Millers at 3s each otwo labourers & a horskeeper at 2s each & 12 horses at 3s each, in all at 54s pr diem that is at d per lwt.
{illeg}A phalf penny flatter a day & a farthing flatter half a day comes to 162s per 1250lwt or d per lwt
A marking engin comes to 8s per 4000lwt or d per lwt, & the lettered Keeping the Engines in repair plates to d per lwt
The charge of coining copper & time it takes up computed.
Source
MINT 19/2/418-19, National Archives, Kew, Richmond, Surrey, UKCa. 1696-99, c. 517 words.