That abbreviation stands for "By the grace of God, Queen" and refers to Queen Elizabeth II so your coin could be from any of the dozens of countries in the British Commonwealth.
Please post a new and separate question with its date, denomination, and the name of the country that issued it. If there's no country shown, it's from the UK.
The twoonie is worth $2. It's not particularily old and still in circulation. dg Regina inscription doesn't add to the value, it's a standard inscription.
25 cents
The DG on British coins stands for Dei Gratia or By the Grace of God. The Reg is for Regina, meaning translates into English as Queen.
Regina is Latin for Queen. Depending on the year of your coin, it could be either Queen Victoria (1837 to 1901) or Queen Elizabeth II (1953 to present). DG or DEI GRA is abbreviated Latin for Dei Gratia - meaning, by the Grace of God.
It's still worth 50 cents.
It's still worth $2 Canadian.
It's impossible to give a specific answer without knowing the date.
You didn't state which country it's from, but the most common $2 coin in the British Commonwealth is the Canadian "twonie". That would make it an ordinary circulation coin worth face value only, somewhere around $1.70 U.S. depending on the current exchange rate.
It's a common circulation coin worth one dollar. To clear things up: > The coin is made of brass and nickel, not gold. > The inscription Elizabeth II D.G. Regina or variations of it is on ALL coins of the British Commonwealth so that's not a distinguishing motto.
Yes, it is.
The value depends on the denomination and condition. An 1887 farthing is going to have a different value than an '87 shilling.
Elizabeth 11 Regina silver 50 cents