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
S 181 Calcot Map DL44
SU668713
SRS diagram S147
S 201 Compton Map DH46
SU524798
SRS diagram L3
S 179 Oxford Road Junction Map DM44
SU702733
SRS diagram L18
  Pound Green Map DM44
SU694695
SRS diagram D103
S 180 Southcote Junction Map DM44
SU697718
SRS diagram B56
Prices are shown here.