Ireland's Easter Rising, also known as the Easter Rebellion, was an armed insurrection during Easter Week, April 1916. The Rising was launched to end British rule in Ireland and establish an independent Irish Republic. At the time, the United Kingdom was heavily engaged in World War I. This coin was issued to commemorate the 50th anniversary of the Easter Rising.
The coin contains 0.486 troy ounces of silver, so it can never be worth less than its base value, or BV. To compute BV, multiply the current price of silver by 0.486. For instance, at the time of this writing, silver is trading at $19.30 US dollars per troy ounce. (The price of silver changes continually. Look it up at kitco.com.) Then BV = 0.486 x 19.30 = $9.40.
These are grand old US coins, J-Money, one of my favorites.
Catalog values for Standing Liberty Quarters start around $25 US dollars for early issues in worn condition. That changes, however, with later issues. In 1925 they changed the design a little and the post-25 coins are worth quite a bit less. Here is a summary of catalog values for the common date coins taken from the Red Book, a well known price guide for US coins. To meet these levels, coins must be free of all problems such as scratches, stains, cleanings, nicks, gouges, corrosion, and the like. Better date coins are addressed further down this page.
These are nice gold coins from the old French Republic:
10 FRANCS: 0.0933 troy ounces gold
20 FRANCS: 0.1867 troy ounces gold
Their value is a combination of gold content and coin collector premium.
To compute the base value (BV) of your coin, multiply its gold content by the current prince of gold. For instance, a 10 franc coin has 0.0933 troy ounces and, say, gold is trading at $1500 US dollars per troy ounce, the BV = 0.0933 x 1500 = $140. The price of gold changes every day, so be sure to look it up on web sites such as kitco.com.
Britain ruled India until 1947. The East India Company issued many interesting coins and did not stick religiously to standard circular shape. Most of the British East India coins show the reigning British monarch on the front with rupee, mohur, and anna denominations on the back. The square pattern in our picture was used on the 1/2 and 2 anna denominations during the mid 20th century. You can see an example of a wavy-edge 1 anna coin at this CoinQuest link.
This coin from Czechoslovakia is made of copper-nickel. Since it is a modern coin made of non-precious metal, it is worth very little. Circulated coins are worth less than $1 US dollar. A fully uncirculated coin may sell to a collector for $1 or so.
Starting in 1983 the UK standardized the 1 pound coin as shown in our pictures. The bust of Queen Elizabeth changes after 1983, and the reverse side changes from time to time. All the coins you find in circulation are made of nickel-brass and are worth face value: one pound in the UK. You can use xe.com to figure exchange rates between currencies of various countries.
In addition to the business strike coins produced for circulation, the Royal Mint also produced proof coins for collectors. You can see the sharp difference between the proofs and business strikes by considering our secondary picture. Four the the coins are proofs; one is a business strike. It doesn't take a rocket scientist to see the difference!