They had a Jamestown exposition in 1907 for the 300th anniversary of the founding of Jamestown, Virginia. Lots of souvenirs were issued, this may be part of one. I found a small medal a few months ago from the exposition. Yours also reminds me of a seal used on a railroad boxcar door. When the car was loaded the seal number was recorded on the shipping papers. If the seal was broken, you knew someone had tampered with the cargo.