Watch List notes:

COMMEMORATIVE MEDALS, Medals by Subject, Engineering, Queen Victoria, the Opening of Blackfriars Bridge and Holborn Viaduct, Copper Medal, 1869, by G G Adams, for the Corporation of the City of London, diademed head of Queen Victoria left, rev views of the viaduct and bridge in wreaths of oak and olive branches, figures of Londinia and Britannia to left and right, 77mm (BHM 2906; E 1604; W 11); Blackwall Tunnel Opened, Charity Open Day, small Silver Medal, 1896, by Vaughton & Sons, view of horse-drawn traffic in tunnel segment, rev legend, 32mm, in case of issue (BHM -; Eimer -). First extremely fine, the second mint state. (2)
Blackwall Tunnel opened in 1898

Estimate: £200-250