Set of 25 vintage or antique clay poker chips MW WM monogram

These tan colored poker chips date at least to the 1940s, and possibly a lot earlier. They are made of a pressed clay-composition material and have a stenciled design that appears to be an ornate M over W or W over M. They were well used and have wear. One has a crack (bottom left), and one a cigarette burn (bottom right), but the rest are in good used condition.