Watch List notes:

COMMEMORATIVE MEDALS, British Historical Medals, Newcastle Upon Tyne and Gateshead, York, Newcastle and Berwick Railway, The High Level Railway Bridge, "Final Opening", 1850, Silver Medal, unsigned, Royal train stopped on the High Level Railway Bridge, rev FIRST PILE DRIVEN ... ENGINEERS ROBT STEPHENSON ..., 45mm (BHM 2409, not recorded in silver, white metal and copper both R3; Swan 62-63, copper and white metal). Toned on the obverse, otherwise mint state and exceptionally rare.
The bridge was built for the York, Newcastle and Berwick Railway and opened 15 August 1849. The Queen's visit was on 28 September, when she received addresses from the mayors of both Newcastle and Gateshead.

Estimate: £250-350