Assuming their dates are 1960 or later, your coins would be ordinary circulation coins that were in use up to early 2002 when they were replaced by euros.
In early 2012, French banks definitely stopped to accept the old currency. They can only retain some value as collectible items. In that regard, coins issued after WWI have a value close to nothing, especially if the coin had been circulated.
5 Francs. The Franc was the French currency before the introduction of the Euro in 2002.
A valuation wouldn't be possible without some indication of the country/currency and the condition of the note.
There were no series letters on any 1929-dated US bills. A large "G" indicates that the bill was distributed through the Chicago Federal Reserve District. There's more information at the question "What is the value of a 1929 US 5 dollar Federal Reserve Note?"
There were no series letters on any 1929 US bills. You may be referring instead to the Federal Reserve District letter; "G" indicates your bill was distributed by the Chicago district. There's more information at the question "What is the value of a 1929 US 100 dollar Federal Reserve Note?"
All 1929 US Federal Reserve notes have brown seals rather than red. They were issued as a now-unusual form of paper money called National Currency. Please see the question "What is the value of a 1929 US 20 dollar Federal Reserve Note?" for more information.
There are two different kinds of 1929 $20 bills. One type of 1929 $20 bill is the Federal Reserve Bank Note. These 1929 twenty dollar bills will generally not be worth more than a few times face value due to their large printing numbers. 1929 $20 bills that are Federal Reserve Bank Notes will say Federal Reserve Bank of Boston, New York, Philadelphia, Cleveland, Richmond, Atlanta, Chicago, St. Louis, Minneapolis, Kansas City, Dallas, or San Francisco. If one of these 1929 $20 bills has a star symbol in the serial number it will be worth much more than a few times face value. The other kind of 1929 twenty dollar bill is the 1929 national bank note. The 1929 national banknotes can be worth a few dollars over face value to several hundred dollars. The value all depends on which bank issued the notes. These 1929 $20 bills will say National Bank somewhere in the title on the left hand side of the note.
Francs are no more used as a currency since Jan 1, 2002. A 500 francs note was worth 76.22 € at the time of the switch (about 95 US$ at an 1.25 exchange rate)
Vingt et unième (21st as a rank) or le vingt-et-un (in dates) ex/ Max est le vingt et unième de la classe > Max is the twenty-first of the class. le vingt et un octobre > October the 21st.
No US $20 bills were dated 1920. A brown seal most likely indicates you have a 1929 National Currency Note. If so, values depend on which bank distributed the bill. Please see the question "What is the value of a 1929 US 20 dollar bill?" for more information.
The Kansas City designation would indicate your bill is most likely a Federal Reserve Note that was printed as part of the National Currency series. Please see the question "What is the value of a 1929 US 20 dollar Federal Reserve Note?" for more information.
There were no series letters on any 1929 US bills. You may be referring instead to the Federal Reserve District letter; "G" indicates your bill was distributed by the Chicago district. There's more information at the question "What is the value of a 1929 US 100 dollar Federal Reserve Note?"
To clear things up, the bill was actually printed in Washington. Boston is the location of the Federal Reserve Bank that distributed it. Please see the question "What is the value of a 1929 US 20 dollar Federal Reserve Note?" for more details.