I live in Vancouver, Washington. About 20 years ago while detecting along the Columbia River below Fort Vancouver my daughter found a 5 cent trade token (with her eyes!) . The front has a big 5 in the center and says Good for 5 (cent sign) in trade. The token has some corrosion along the top so on the reverse I can only make out servi____co. across the top. Center of the coin says POOL. Along the bottom reverse it says 7th Inf. It appears to be aluminum or possibly tin, definately not silver. Have tried to research it without much luck other than to find trade tokens were used at Fort Vancouver. I am assuming it's a trade token from Fort Vancouver only based on where I found it. I'll try to post a pic of it ASAP. Any info would be appreciated