The "Charles III" coin was issued to commemorate the 100th anniversary of Monte Carlo. That place (legally a district rather than a city) was founded in 1866, and named after Prince Charles whose portrait and years of reign you find on the coin.
The second coin you have is not the essai version but the regular one of that issue. Mintage 25,000 according to the Schön: 24,000 BU and 1,000 proof.
Christian
The second coin you have is not the essai version but the regular one of that issue. Mintage 25,000 according to the Schön: 24,000 BU and 1,000 proof.
Christian




















