Location where this marker was located is undetermined.
Maker of these double-sided stream markers has never been determined.
Known only from the photo below, which was found on EBay in 2019 by jgl.
Conococheague Creek originates near Caledonia State Park and flows some 80 miles to the Potomac River in Maryland.
Date unknown photo found on Ebay by jgl.
Original location undetermined. Marker long gone.