2/6 – half a crown or 12.5d in new(! post 1971) money. This is will make a pendant of interest for someone. It is 50% silver so worth more than face value. The silver band is formed around the coin, so it is very secure, but does not damage the coin in any way so my method is safe for all sizes and value of coin. I have some Roman bronze coins mounted this way in my shop.