Pwllheli West Ground Frame is a Dutton type 2 design, built for the Cambrian Railways in 1909. A currently operational former signal box, now boarded up, it is classed as a ground frame with 4 levers active in its original 1909 frame.
Sources include: Peter Kay, Signalling Atlas and Signal Box Directory (Third Edition), Signalling Record Society, Wallasey, 2010; Network Rail, Signal Box Register (undated). For further information on the types and designs of signal boxes see: The Signalling Study Group, The Signal Box - A Pictorial History and Guide to Designs, OPC, 1986.
B.A.Malaws, RCAHMW, 20 March 2015.