The way to do the test is written in Paddy's post. Silver will reflect more light than cupro nickel cladding. Grab a tissue put the two coins underneath and hit it with light. take a photo. By the way, click on full size photos and crop your pics. It will help you get better answers. These thumbnails are a pain in the butt to look at.
Good example why many people do such things $$. Etsy, EBay, Craig'slist, etc. I don't think any of us mind checking and explaining....as long as someone insist they can't be wrong. Jim