The Namaqua Copper Company 0-4-2ST Pioneer of 1901 was a South African steam locomotive from the pre-Union era in the Cape of Good Hope.

Until the Namaqua Copper Company acquired its own 8 ton capacity mainline trucks, goods and ore had to be transshipped at Braakpits Junction.

[1] The locomotive Pioneer was too light for work on the Company's mainline to Braakpits Junction and was placed in service on the tramway to Tweefontein.

A chain of blockhouses and other defensive positions had been prepared and early in the siege, the garrison succeeded in repulsing several determined attacks by the commando.

However, when the departure of Smuts with a British safe-conduct to the deliberations at Vereeniging heralded the end of the war, the siege became little more than a good-humoured blockade.

[2] On 1 May 1902, the commandos launched an attack on O'okiep, using the commandeered locomotive Pioneer to propel a mobile bomb in the form of a truck-load of dynamite into the besieged town.

The protective defences at O'okiep consisted of a barbed wire fence which was erected across the railway line at Braakpits Junction, just north of the town.

The obverse of the Cape Copper Company Medal for the Defence of O'okiep depicts a miner with a spade, standing next to an ore truck.