The coin with the inscription "FID DEF IND IMP" is from the United Kingdom. This inscription stands for "Fidei Defensor" (Defender of the Faith), "Indiarum Imperator" (Emperor of India), and is commonly found on British Coins. It dates back to the time when the British monarch was also the Emperor of India.
IND IMP was part of a much larger title used by British Monarchs. It is abbreviated Latin and means Emperor (or Empress) of India. IND IMP (India Imperator) was used on British and British Empire/Commonwealth coins from about 1893 when India became part of the British Empire, until 1948 when India became independent. Depending on who was king or queen at the time and which particular coin it appeared on, the legend may have appeared as - "VICTORIA DEI GRA BRITT REGINA FID DEF IND IMP" "EDWARDVS VII DEI GRA BRITT OMN REX FID DEF IND IMP" "GEORGVS V DEI GRA BRITT OMN REX FID DEF IND IMP" "GEORGVS VI DEI GRA BRITT OMN REX FID DEF IND IMP"
I imagine this to be a coin set in a mount on a ring, but the description is incomplete. If it is a coin it is probably a sovereign. Modified coins have no collector value.
Such a coin does not exist. Queen Victoria died in 1901. The legend "Victoria-dei-gra-britt-regina-fid-def-ind-imp" does not help identify a coin. It could appear on any British or British Empire coin issued from 1838 to 1901. You need to describe the design on the coin, the metal it appears to be made from and the diameter. Coins dated 1951 would have George VI on them. If you do indeed have a Queen Victoria "coin" with 1951 on it, it may well be a souvenir token commemorating the 50th anniversary of her death.
On a coin, it means a King George V One Florin coin minted in 1930. It will be a British coin in the absence of a country name. FID DEF IND IMP is heavily abbreviated Latin for FIDEI DEFENSOR INDIA IMPERATOR meaning, "Defender of the Faith, Emperor of India" referring to the title of the King. The full regal title from this period is - GEORGIVS V DEI GRATIA BRITTANIA OMNI REX FIDEI DEFENSOR INDIA IMPERATOR George V by the Grace of God, King of all the British territories, Defender of the Faith, Emperor of India (more or less).
"Victoria dei gra britt regina fid def ind imp" appears in one form or another on all British coins issued during Queen Victorias reign. Sometimes half of the legend appears on the reverse of the coin. The "IND IMP" was added to coins around 1893 when India became part of the British Empire. What does your coin appear to be made from? Are there any dates on it? What is the diameter of the coin? What are the three initials? Does the side with the initials have anything on it other than the initials? It is possible that your coin is a military medal, a medallion or a token.
That motto appears on ALL British and British Empire coins of the time and (with variations for each monarch) is still used today, so it doesn't help to ID a specific coin. Please post a new question with the coin's country of origin.
FID DEF is short for Fidei Defensor (Defender of the faith)IND IMP is short for Indiae Imperator (Emperor of India)
15 years is a very big mistake especially for a gold coin. I suggest that the coin is not what it appears to be. A reputable coin dealer will be able to identify your coin and give a valuation if it turns out to be genuine.
"Fid Def Ind Imp" stands for "Fidei Defensor, Indiae Imperator" which is Latin for "Defender of the Faith, Emperor of India." This inscription was used on British coins to signify the monarch's role as the head of the Church of England and the ruler of the British Empire. On a 1937 Halfcrown, this inscription would refer to King George VI, who reigned as the Emperor of India from 1936 to 1947.
All coins from the British Empire have that motto. Please post a new question with your coin's denomination and the country, if it's given. If the coin does not show a country name it's from the U.K.
You are the second person to ask about an Australian coin that, in theory, should not exist. Can you provide any more detail about your coin?
George V coins were issued from 1911 to 1936 inclusive.