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
  Carmarthen Valley Junction Map BK57
SN631218
SRS diagram not available
S2219 Cynghordy (L.M.S.) Map BP62
SN802407
SRS diagram S297
S1940 Devynock and Sennybridge Map BR59
SN924289
SRS diagram D527
S2132 Ffairfach Map BK57
SN629213
SRS diagram D40
S2228 Golden Grove Map BJ57
SN590210
SRS diagram not available
S2227 Llandilo Bridge Map BK57
SN628215
SRS diagram not available
  Llandilo North Map BL58
SN634228
SRS diagram not available
S2133 Llandilo South Map BL58
SN634226
SRS diagram P139 (Llandilo 1955)
S2218 Llandovery North Map BN60
SN764346
SRS diagram B142 (No. 1)
S2217 Llandovery South Map BN60
SN761342
SRS diagram S429 (No. 2)
S2136 Llangadock Map BM59
SN714310
SRS diagram P139
S2216 Llanwrda Map BN60
SN740326
SRS diagram S801
Prices are shown here.