20 shillings
The Guinea was worth £1 and 1 shilling or 21 shillings. The Guinea was used mostly in racing circles and in auctions. You can still find a few golden Guines's around today they are quite valuable. A guinea was worth £1.1 shilling in the days when £1 comprised 20 shillings. Once made of gold from Guinea, guineas used to be the regular currency for buying horses. Hence the title of the 2000 Guineas race-that being the amount in the prize fund in 1809. 1 guinea and a £5 coin. 1 guinea = £1-1s-0d (£1/1/-) = one pound and one shilling = 21 shillings. (which is £1.05 in todays money). 1 guinea could be written as '1g' or '1gn'. A guinea in British money was worth £1.05 - one pound and one shilling. So at today's exchange rate this would amount to around $1.50. It was effectively replaced by the gold Sovereign coin in 1817. The Guinea had a face value of 21 Shillings or, One Pound and One Shilling (in predecimal currency). Although the coin no longer exists, the value remains in use, and is often used to value antiques and racehorses amongst other things, but is not used in day to day commerce. 1 Guinea pig food costs around $5 for a 5-pound bag, or about $5-$10 per month depending on the size and appetite of the guinea pig. 2  Harnesses used to take guinea pigs for a walk or to play in the yard run $5-$7. 3  Exercise balls are priced $14-$17. 4  Common Veterinary costs include spay or neutering for around $45. One shilling is now equal to five (new) pence making a guinea worth one pound and five pence in todays currency (£1.05). The slang term for a pound or a number of pounds sterling is ' quid ' or ' nicker ' and there are other slang terms for various amounts of money.
https://uk.answers.yahoo.com/question/index?qid=20081024005749AAvt5SQ http://www.telegraph.co.uk/finance/personalfinance/10416806/Guinea-sovereign-shilling-a-short-history-of-the-British-coinage.html http://www.woodlands-junior.kent.sch.uk/customs/questions/moneyold.htm http://www.answers.com/Q/How_much_would_one_guinea_of_1877_be_worth_today http://www.answers.com/Q/How_much_would_one_guinea_of_1877_be_worth_today http://pets.costhelper.com/guinea-pig.html http://www.studyenglishtoday.net/british-money.html
how much is a guinea worth now