The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Cairo. Mosque Sultan Hassan. Serie 646. The Cairo Post Card Trust. Ph. N. 721
Le Caire. Mosque Sultan Hassan. The Cairo Postcard Trust. Serie 207
Cairo. General View Showing Sultan Hassan Mosque. The Cairo Postcard Trust. Serie. 597
Caire. Mosquee Sultan Hassan. The Cairo Postcard Trust
Cairo. Panoramic View and Sultan Hassan Mosquee. The Cairo Postcard. Series 646
Cairo. Mosque St. Sultan Hassan. The Mosque of Sultan Hassan. L. Scoitzis. No. 451
Cairo. General View Showing Sultan Hassan Mosque. Cairo Postcard Trust. Serie 597