The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Black Gate and Castle. Newcastle on Tyne. Collo Colour. Valentines
5396. Castle and Black Gate. Newcastle on Tyne. Horse. 1906
Old Castle and Black Gate. Newcastle on Tyne. Hartmann. 1904
Newcastle. Castle and Black Gate. Ruddock. 1904
Newcastle upon Tyne. Black Gate and Castle Keep. The Society of Antiquaries of Newcastle upon Tyne
Newcastle on Tyne. Castle and Black Gate. 67434. Photochrom
Newcastle. Black Gate. Auty Series. G. H. W. B. 1904
Newcastle On Tyne. The Castle and Black Gate. Photochrom