Would this be a one off and unique piece?
http://www.network54.com/Forum/330333/t ... n+Capetown
Unfortunately I cannot answer your question but what I can say is that the guns in picture are on exhibition at Fort Wynyard, previously the base for The Cape Garison Artillery (Kaapse Vestings Artillerie) a reserve AA regiment of the S.A Defence Force. They have contact details on their website and I am sure that someone there will be able to help you. See:
You might be interested to know that, at last the residents of Cape Town and their local government have woken up and are now doing what they can to save the remnants of fortifications and gun emplacements in and around that beautiful city.
When next you're in Cape Town you might want to check out what's termed "the highest density of gun sites in the world" - According to Brigadier General (Rtd.) John Del Monte of the South African Military History Society. Cape Town reportedly now also has the oldest working coastal battery in the world - Hout Bay's East battery of eight 18 pounder Finbanker guns was built in 1783. There is also the Chavonnes Battery with a pair of "extremely rare" 1880's Canet 75mm breech loading guns in their possesion - Do you know anything about these?
Of more relevevance to this forum is Fort Wynyard, a WW2 era coastal defence battery within easy walking distance of the Victoria & Albert Waterfront and adjacent to the Green Point Stadium. This fort is to be upgraded immediately and will be re-opened (May 2010) as a living museum and major tourist attraction. See the June 2009 newsletter of the S.A. Military History Society (Suid Afrikaanse Krygshistoriese Vereniging) at:
There are also contact details and someone here should be able to give you more details on that strange looking 15 Pounder.