The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Pen y Gareg Dam Elan Valley. Rhayader. From Wallace Jones Studio
Pen Y Gareg Dam. Elan Valley. Jarrold. RP
Pen y Gareg Dam Elan Valley. Jarrold. Cotman Color. 1967
Pen Y Gareg Dam. Elan Valley. Rhayader
Pen Y Gareg. Dam Elan Valley. R. D. M. Hill. Stationery and Toys. RP
Pen y Gareg Dam. Elan Valley Rhayader. 10073. Judges LTD Hastings. Postcard Picture
Elan Valley. Pen y Gareg Dam. Judges. 4116. Multi View
Pen y Gareg Dam. Elan Valley. A. F. S. ELNV. 10. Friths Series