Interesting find - and we have 6 of them. We believe they are key chain medallions or tags issued for an annual hunt but really not sure beyond that. Many hunting clubs issued key chain medallions as proof of club membership (we are guessing). This is likely for West Chester PA otherwise it?s for West Chester in England in which case it?s probably much older than we realize. Regardless, we have 6 of them and will sell them individually or as a group to whoever wants them and shows up first to grab them. If you buy more than one, there is a discount. About the size of a US Nickel coin. See photo. Will ship USPS with tracking to winning buyer and at least until the next postal increase we will ship free within the US.