The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Gibraltar. St. Michael Cave. Rock Photographic Service
Gibraltar. St. Michael Cave. Rock Photographic Service. No. 103. Golden Shield
Gibraltar. St. Michael Cave. Estoril
Gibraltar. St. Michael Cave. John Hinde. Marama Rock Trading Agencies. E. Nagele. 1979
Gibraltar. St. Michael Cave. Charpo
