Unknown. No maker of stream markers has been determined
Marker is long gone from this post. Only the bottom portion of it remains attached to the post. This post was removed by PennDot in January 2018 and will be used by KMT in another location.
1976 photo by Fred Yenerall
June 2012 photo by JGl shows the post with marker missing
PA Route 31 at Manns Choice
Post only with bottom portion of marker still attached