The imagery is of a sentry atop a castle watch tower, but it's generic. A 'fashion' button used on gentleman's clothing such as blazers. A number of variations exist. These are circa 1900 into the Edwardian period:
The imagery is of a sentry atop a castle watch tower, but it's generic. A 'fashion' button used on gentleman's clothing such as blazers. A number of variations exist. These are circa 1900 into the Edwardian period: