Bronze Age Gold from Wales

East Pit Winder, Elliot Colliery. General arrangement of alterations to winding engine for Messrs. Powell Dyffryn Steam Coal Co. Ltd., WP Cylinders 28" Diameter, LP 42" Diameter x 6' stroke, winding drum 15' to 25'. Semi conical. Scale 3/4" to 1'. 10.11.64

Engineering blueprint with stencilled and handwritten title at centre of bottom edge and a handwritten note in red pencil recording name of pit, serial number and when the plan was received written at lower right-hand corner of drawing.