In EF about $375; in AU about $1900.
Its so cheap about 4-8 euros/ UNC or aUNC in Hungary
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern C-AUNC--. That is, eight letter words with 1st letter C and 3rd letter A and 4th letter U and 5th letter N and 6th letter C. In alphabetical order, they are: chaunced chaunces craunchy
An uncirculated coin is bought at the time of it's release, in some sort of protective packaging. If it is out of the packaging, it loses it's status as "uncirculated" and becomes "almost uncirculated" (aUnc), ie. it has been handled. If a coin is in such good condition that you have trouble telling whether or not it has been circulated, get a magnifying glass and examine it very closely. A circulated coin will have very small scratches and nicks on the smooth surfaces. Discolouration or a darkening of the coin does not necessarily mean that it has been circulated.
Don't know how long this is up but it depends on the condition. If its in very good condition it would fetch a premium over later years. War years notes from 1939 -1945 are pretty rare and expensive to buy because they have a C stamp on them. if you put it up on ebay you will find out pretty quick. My guess you would get 50 euro for it.
You are asking about a 1 Cent coin (KM#32) from the Straits Settlements (which corresponds to that portion of present-day Malaysia that is connected to continental Asia). The coin is square with rounded corners, measures 21mm across, and is made of bronze. The front bears a portrait of King George the Fifth and the words "GEORGE V KING AND EMPEROR OF INDIA". The back has two circles,one within the other; in the inner circle is a large "1" with the word "CENT" below; surrounding the inner circle, but within the outer circle, are the words "STRAITS SETTLEMENTS", with the date below. 55,000,000 such coins were produced for circulation in 1920, as well as a small number in proof condition for collectors. According to the Standard Catalog of World Coins, an example is worth US$0.50 in Fine condition, US$1.50 in Very Fine condition, US$10.00 in Extremely Fine condition, US$40.00 in Uncirculated condition, and US$500.00 in Proof condition.