Actually BronzeAge (that's me) is the original thread starter with the Korean coin. You and Burton are the ones who did all the research. PaddyB had a significant amount of info as well. I'm pretty sure this Eisenhower dollar is 40% silver, and this 1963 set has 3 coins that are 90% silver, but what about the set at the top of the picture? Looks like it might have a silver half dollar, but not sure.
Funny thing...... In 1990 I won a 1969 Uganda 12 piece Proof Set for $873.00 The 5 AV coins are close to 8 troy oz gold never gave it a thought, but the 7 Silver ones= 168g So a good buy! The 1000 shilings 140g.