Auction Catalogue: Great Central Railwayana, 3 December 2016
| Lot 157 | A GWR signal box diagram, GELLI TARW JUNCTION, 1946, showing lines to Cwmavon, Robertstown and Hirwaun. Framed (modern), 53"x19" £100-200 |
| This lot sold for £820. |
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Auction Catalogue: Great Central Railwayana, 3 December 2016
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