$300
The year on the Swiss Franc coin says nothing about the value but about the date when the coin was fabricated. Check out the number on the coin to see how much it's worth. You have the smallest piece (5 Rappen) going up to pieces of 10, 20 and 50 Rappen (100 Rappen = 1 Franc) , 1, 2 and 5 Swiss Franc coins.
Frankingold
About 21 cents.As to numismatic value, it depends on the year and the condition, but the coin you are referring to is a 20 rappen coin from Switzerland (there are 100 rappen to the Swiss Franc). As to foreign exchange value, 20 Swiss rappen equals (as of March 5, 2009) about 17 US cents.This is a Switzerland 20-Rappen coin, and retails anywhere from about 25 cents to five or six dollars, depending on condition.
1864 avery to good condition
Switzerland ("Confoederatio Helvetica" is Latin for the "Swiss Confederation") issued no 20 Franc coins, gold or otherwise, in 1970. It did issue a 20 Rappen coin (there are 100 Rappen to the Franc), which is a silver-colored coin 21 mm in diameter (about the size of a US nickel). Numismatically, it is worth perhaps a US dollar in Uncirculated condition, and no more than face value (about 19 US cents as of December 2009) in circulated condition.
Probably a 20 Franc coin from Belgium. At the time it was issued, it would have been equivalent to about $1.60; however, Belgium now uses the Euro, and has demonetized its Franc-denominated coins, so its only value now would be its numistmatic value (that is, its value to a coin collector). Unless it is in uncirculated condition, it is unlikely to be worth more than a few cents, which is also probably its value as scrap metal.
We need a lot more description to place a value on a coin. 20 what - Dollars, Franc (French, Swiss, or Belgian)? Is there a mintmark? What condition is it in, graded by ANA standards?
Absolutely nothing at all. The franc is no longer in use, and there are many, many thousands still kicking around the world. Maybe in a thousand years it will have value, but there's no guarantee even of that.
This is a 102-year old coin from Switzerland. Value depends on denomination and condition. Possible denominations are 5, 10 or 20 Rappen (back of coin has just a number), or 1/2, 1, 2, 5 or 20 Francs (all of which are silver, except for the 20 Franc which is gold). No 10 Franc coins were minted in 1907.
It wort about three dollars
this coin has no supplementary numismatic worth. So, check the gold prices... Weight of this coin: 6,45 gramm, with only 90% of pure gold!