Found during the Northern Picts project excavation working at Rhynie, Aberdeenshire in 2012. 

"The high-status metalwork also includes an axe-shaped pin with a serpent design that resembles the axe carried by the Rhynie Man"

For more information look to the Northern Picts project, Department of Archaeology, at the University of Aberdeen (no affiliation, photo from the Northern Picts project site)