.1 Cas is perhaps the most desirable silver Cas given the low denomination and wide appeal, and that’s a fantastic grade. I imagine it could sell for around .7 these days.
I bought a 3-pc set of a metal box two years ago from a forum user here. As he had lost his previous password, and had to log in as a newbie, he sold it to me mainly throught email communication. The Lealana silver coins are similar to the one sold by OP, and the denomination of them are 5, 15, 25. Cheers, everyone.