Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Papes re. traffic control lights, 1958
2001.142/37 (1 of 3) - covering letter written by C.H. Watkins. Diagram drawn in pencil on reverse. 2001.142/37 (2 of 3) - page 1 of handwritten letter giving details of invention for improved traffic control lights. 2001.142/37 (3 of 3) - page 2 of handwritten letter giving details of invention for improved traffic control lights.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.