William,
I can't find any photos of the pit, the nearest I came was a photo of the riot squad on the bank at Brynkyinalt in 1912. Apparently ready to curb any trouble. This photo is in G.C Lerry's book "Collieries of Denbighshire", where incidently there is a photo of the Wynnstay Colliery 1896-1927.
Keith