Multi coin identification extravaganza

Do any of these coins contain silver and what year is the last coin(the 1/4 yang) from?
Each pair of two represents 1 coin.

OK, here we go...
#1--Czechoslovakia-1 Koruna. Copper-nickel. 1922=about $0.50 KM#4
#2--Columbia-5 Centavos. Copper-nickel. 1949=$2-$4(varieties exist)KM#199
#3--Dominican Republic-5 Centavos. Copper-nickel. 1961=$0.15 KM#18
#4--Brazil-100 Reis. Copper-nickel. 1901=Fine $1 KM#503
#5--British East Carribean Territories-25 Cents. Copper-nickel. 1955= $0.25 KM#5
#6--Korea-1/4 Yang. Copper-nickel. not sure of year or variety. $5-$500(depending on year and variety) KM#1109, 1110, or 1117

Hope this helps...

Scott

OK, here we go...
#1--Czechoslovakia-1 Koruna. Copper-nickel. 1922=about $0.50 KM#4
#2--Columbia-5 Centavos. Copper-nickel. 1949=$2-$4(varieties exist)KM#199
#3--Dominican Republic-5 Centavos. Copper-nickel. 1961=$0.15 KM#18
#4--Brazil-100 Reis. Copper-nickel. 1901=Fine $1 KM#503
#5--British East Carribean Territories-25 Cents. Copper-nickel. 1955= $0.25 KM#5
#6--Korea-1/4 Yang. Copper-nickel. not sure of year or variety. $5-$500(depending on year and variety) KM#1109, 1110, or 1117

Hope this helps...

Scott

Thanks! I couldn't have found better help anywhere else. Where do you get all this information though. book, website, experience?

Also whats a KM#

Someone want to help me out here...

Scott

KM # is the Krause and Mishler number to identify each coin. From Standard Catalog of World Coins

KM # is the Krause and Mishler number to identify each coin. From Standard Catalog of World Coins

Thanks Don.
 
Scott