Model, scale 1:8, of George Stephenson's first railway bridge, the Gaunless Bridge at West Auckland, County Durham, England, 1824, unsigned, British, 1824-1896. The Gaunless Bridge is reputed to be the first iron railway bridge.

The Stockton and Darlington Railway was the first public steam railway in the world. George Stephenson surveyed the line and was responsible for its construction, including the design of the bridge over the River Gaunless in West Auckland. The Gaunless Bridge was on a branch of the line operated only by horses. The bridge was completed in 1824 and was one of the earliest to be made of iron.

This presentation model of the Gaunless Bridge was made for the North Eastern Railway in 1875 to mark the 50th anniversary of the opening of the Stockton and Darlington Railway.