The 2,000 year old Netherton Tricephalos discovered in 1968 in Netherton, Wishaw. Image credit: Glasgow Art Gallery and Museum Howburn Digger Feb 8, 2014
There's an article by Anne Ross that talks about it here
euppublishing.com/doi/pdfplus/10.3366/gas.1974.3.3.26
and a couple of different views.
The faces are somewhat 'fierce and sinister' like she says? Very interesting