The picture shows a view of this Old Grand Canyon National Park Watchtower Advertising Souvenir Charm. The charm is not dated but it is old. It is believed to be made of silver plated copper. It has an image of the Watch Tower at the Grand Canyon. It is marked on the front and back as follows:
WATCHTOWER GRAND CANYON NAT'L PARK BATES & KLINKE ATTLEBORO
The charm measures 1'' wide and is in excellent condition as pictured.