RISC OSMap of G.W. SignalboxesRISC OS
http://www.svrsig.org/gwmap/GWMap.htm
Sxxxx numberSignal Box nameView on map squareOther information including SRS diagram number
S3219 Llwyngwril Map BJ79
SH589097
SRS diagram not available
S3215 Towyn Map BJ77
SH584005
SRS diagram D556
Prices are shown here.