I'm not sure there's a whole paragraph in this article without an error, omission or oversight. Mite doesn't have a standard definition. My unabridged Oxford

I'm not sure there's a whole paragraph in this article without an error, omission or oversight. Mite doesn't have a standard definition. My unabridged Oxford dictionary says it was just a very small amount of money, and people gave it various definitions. Copper means any copper coin, it's never been specific to a one penny coin. Currently it means the copper-coloured coins, 1p or 2p. Groats as coins worth four pence were last issued in 1662, and according to the OED later 4 pence coins were called fourpence or fourpenny bits/pieces, including in casual speech. Most of the words are straightforward fractions or multiples of a penny, with optional slurred pronunciations: ¼ penny = farthing ½ penny = halfpenny or ha'penny 1 penny, usually abbreviated as 1d 2 pence = tuppence 3 pence = thruppence, thre'penny bit 4 pence = fourpence piece, fourpenny bit 6 pence = sixpence (slang: tanner) 12 pence = 1 shilling (slang: bob) 2 shillings = 1 florin (slang: two bob bit) 2s 6d = half crown 5 shillings = 1 crown 20 shillings = 4 crowns = 1 pound 21 shillings = 1 guinea As I understand it, normally prices and other quantities were spoken in pounds, shillings and pence unless they fitted a coin exactly. Something cost "6 shillings", not "1 crown 1 shilling" or "3 florins" etc. Just like the USA, where a movie ticket presumably once cost a nickel, then a dime, but then 15 cents. (Although none of the old words above are in standard usage in Britain.)