One Farthing GBP in 1666 had the purchasing power of about £0.11 GBP today.
NOTE - This historical conversion is the result of many calculations and considerations by a purpose designed program for which I can take no credit. The resulting answer should only be regarded as an approximation.
1666/100000 = 833/50000
25% of £1666= 25% * £1666= 0.25 * £1666= £416.50
2 x 7 x 7 x 17 = 1666
3+6+9+...+4998 = 3(1+2+3+...+1666) =3 x 1666(1666+1)/2 = 4165833
A farthing was a quarter of a pre-decimalisation penny and ceased to be legal tender at the end on 1960.
A penny farthing in fair to good condition, can be worth between £800 to £1500.
Half-Farthing coins were only produced during the early part of the 19th century.
The penny was considerably larger, as a farthing was worth 1/4 of a penny. Those old-timey bicycles with the giant front wheel were nicknamed "penny-farthings" because of the size difference in wheels.
A Penny Farthing was a 19th Century bicycle invented in 1871 by British engineer, James Starley. A Penny and a Farthing are both coins from the now redundant British predecimal currency system. The Penny Farthing bicycle was so named for the contrast of the size of the front and back wheels which were likened to a Penny and a Farthing.
A "Penny Farthing" is not a coin, it was a very popular 19th Century bicycle invented in 1871 by British engineer, James Starley. It was called a "Penny Farthing" because of the disparate size of the two wheels, which were likened to a "Penny" and a "Farthing". There were Penny coins and Farthing coins, with four Farthings (Fourthings) to the Penny. Make up your mind which coin you have and resubmit your question.
fraction of 1666 = 1666/1
These coins are part of the now long redundant British predecimal currency. Values from least to most are - A Farthing is one quarter of a Penny A Halfpenny is one half of a Penny One Shilling is worth 12 Pence (or 12 Pennies) A Florin is worth 2 Shillings (or 24 Pence) A Crown is worth 5 Shillings (or 60 Pence)
Multiples of 1666, like 1666, 3332, 4998 and so on.
Modified coins have no collector value.
1666, GF of L, yes, what about it? Great Fire of London was in 1666.
A farthing was 1/4 of a penny.
A 1944 farthing* in average condition sells for less than a dollar. (*) Note : A "penny farthing" is a type of bicycle. A farthing is 1/4 of a penny, so the terms do not go together (e.g. you would not say "a dime quarter")