1918 British threepence ($1 at most) and two coins of Thailand, look like ½ baht, but without diameters, not sure. If that's correct, they're 10c coins.
The pics are very nice. The three pence is probably just melt value, maybe there's some tiny collector value. I'd pay 1 to 2 for it.
Thanks everyone! They came with a collection I bought and I had no clue about them. The Thai coins are tiny. Smaller than a dime.
They are worth a nickel apiece, and the grade is immaterial. In Thailand (if they are still legal tender), they won't even buy a stick of gum. Today, on the foreign exchange website www.xe.com, 1 baht is 3 cents; that makes 5 satangs (1/20th baht) about 1/6 of a penny.