Coalbrookdale half-penny token, 1792, illustrating iron bridge at Coalbrookdale and inclined plane at Ketley. 30mm diameter. rim legend: Payable At Coalbrook Dale and Ketley. 2mm thick. obverse: Inclined Plane at Ketley. 1789. scene of plane in operation. reverse: Iron Bridge at Coalbrook Dale. 1792. Erected Anno 1779. Span 100 Feet. scene of bridge and ship beneath on river Severn.