Nowhere. It's a common circulation coin in England worth face value only. A dealer here might give you a few cents for it and throw it in his "grab box" of foreign coins.
It's a rare coin You collect them
An undated 20p coin, which was produced in very limited numbers, can be worth significantly more than its face value due to its rarity. While banks typically do not exchange such coins for more than their face value, collectors may pay anywhere from £50 to several hundred pounds for an undated 20p coin, depending on its condition and demand. Therefore, it’s best to check with coin dealers or collectors for its market value.
7
Jewelry and coin exchange coin shop
I have geroge v. king emporer coin of 1919 indian 1 RS. i want to sell can you tell me what is price.
It is worth 20p.
A British 20p coin with no date present (2008 mule error) may be worth around £30 - £90. Sell it anyway you'll make a load of dosh!
Britain introduced a 20p coin on 9 June 1982.
A 20p coin weighs approximately 5 grams.
1982
It's a Heptagon
eBay
It's a rare coin You collect them
One 20p coin and one 5p coin.
A 20p coin has a total of 6 sides: one for each of the two faces (obverse and reverse) and the four edges. The term "SIDS" typically refers to "sides," so in this context, a 20p coin can be said to have 6 sides.
In British coinage the denominations lower than the 20p coin are the 10p, 5p, 2p, and 1p coins. There was also a half penny coin but this was withdrawn from circulation in 1984.
The volume of a 20p coin, which is a British coin, is approximately 3.5 cubic centimeters (cm³). This volume is derived from its dimensions: it has a diameter of 21.4 mm and a thickness of 1.7 mm. The coin is made of nickel-brass, contributing to its overall weight and volume.