Quick question: is BW 29 5" Howitzer British or Boer?
Presumably British, as the only Howitzers the Boers had were 4 Krupp Howitzers?
In fact, the Boers had very little artillery at all.
The two Boer Republics had around 50 guns in total between them but they were a mix of Creusots, Krupps and Maxim-Nordenfelts all of which measured barrel calibre in millimetres/ centimetres so yep, as 5" they'd be British.