I do not remember what WICO means. They bought out Langworthy Casino Supply. Went bankrupt in a few years. I have the years at home.
The chips were made at RT Plastics in LV.
When saying WICO mold, you are mostly saying WICO distributed the chips. Most of us call the mold 3Crown, 4 Crown, etc. Gamblers General store also distributes the same mold.