Here are some approximate catalog values for 10 and 20 Cuban centavos. They both bear the shield and star pattern shown in the picture
10 (DIEZ) CENTAVOS:
worn: $2 US dollars approximate catalog value
average circulated: $4
well preserved: $8
fully uncirculated: $80
10 centavos dated 1916 and 1920 are rare, cataloging around $35 in well preserved condition
10 centavos dated 1948 and 1949 are common, cataloging around $2 in well preserved condition
20 (VEINTE) CENTAVOS:
worn: $3 US dollars approximate catalog value
average circulated: $5
well preserved: $15
fully uncirculated: $120
20 centavos dated 1932 are rare, cataloging around $250 in well preserved condition
20 centavos dated 1948 and 1949 are common, cataloging around $5 in well preserved condition
There are some nuances with these coins that may get collector juices flowing. The 1915 20 centavos was made with both a fine reeding and a coarse reeding on the edge. Also, it was made both with a low relief star and a high relief star! That means that just for 1915, there were four different 20 centavos coins. The 'high relief star, fine reeding' and 'low relief star, coarse reeding' varieties are common coins. However, if you have one where the differences are switched around, you have a valuable coin.
- A 'low relief star, fine reeding' 1915 20 centavos coin catalogs for $50 in average circulated condition.
- A 'high relief star, coarse reeding' 1915 20 centavos coin catalogs for $150 in average circulated condition.
Unfortunately, it is virtually impossible to differentiate high/low relief and coarse/fine reeding coin over the Internet. It is not easy in person. If you have a nice-looking 1915 20 centavos, seek out a knowledgeable collector or professional coin dealer to help identify what you've got.
If you have a common date coin worn down to a frazzle, it will only be worth value of the silver it contains. These coins weigh 2.5 and 5 grams, respectively, and are made of .900 pure silver. There are 31.1 grams in a troy ounce, so a 20 centavos contains 5/31.1 = 0.1447 troy ounces of silver per coin. At the time of this writing, silver prices are around $24 per troy ounce, that works out to just about $3.50 per coin.
Also, be sure you understand what 'catalog' means. Use our Terminology page.