Mary Oakeley
An 0-4-0VBT, similar in general appearance to a De Winton, that was built by the Falcon Engine & Car Works of Loughborough. It was new at Oakeley Slate Quarries in 1883 and around 1904–1906 it was at the Moel-y-Gest Granite Quarry at Porthmadog. During this period it was photographed at Harbour Station, returning to Oakeley probably in 1906. It was used by the Moel Y Gest Co. to transport their quarry's output from the foot of their incline (still visible) and along their tramway which used part of the Gorseddau & Croesor tramways to the harbour.
It is possible that this is a de Winton loco of earlier origin, having been repaired by Falcon and resold with their plates.