The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives.
At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.

The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939.
The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.

Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.

The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.

In 1938, a further 95 locomotives were ordered, built by three manufacturers.
Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.

Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones.
In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770.
Of this order, engine no.
2734, RSH works no.
7247, was lost at sea off the east coast of England.
Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.

The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370.
These engines were delivered with Type MX Torpedo tenders.

In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.

Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.

In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.
The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.
The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C with piston valves and Walschaerts valve gear instead of rotary cam poppet valve gear.
Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.
The first forty were built in Germany in 1937, twenty with domeless boilers by Friedrich Krupp AG in Essen and numbered in the range from 2506 to 2525, and twenty by the Borsig Lokomotiv Werke in Hennigsdorf, Berlin and numbered in the range from 2526 to 2545.
In 1938, a further 95 locomotives were ordered, built by three manufacturers. Škoda Works in Czechoslovakia built fifteen numbered in the range from 2626 to 2640, Krupp built forty, this time with domed boilers and numbered in the range from 2641 to 2680, and Borsig built forty numbered in the range from 2681 to 2720.
Locomotive building was interrupted by the Second World War and post-war locomotive procurement saw European suppliers being replaced by British ones. In 1947, the first fifty post-war Class 19D locomotives were delivered by Robert Stephenson and Hawthorns (RSH) of Darlington, England and numbered in the range from 2721 to 2770. Of this order, engine no. 2734, RSH works no. 7247, was lost at sea off the east coast of England. Its replacement with RSH works number 7360 was paid for by insurance and it was given the number 2734 of the lost locomotive.
The final batch of fifty Class 19D locomotives for the SAR were delivered in 1949 by the North British Locomotive Company (NBL) of Glasgow, Scotland and numbered in the range from 3321 to 3370. These engines were delivered with Type MX Torpedo tenders.
In 1951, six were built by NBL for the Caminho de Ferro de Benguela (CFB) in Angola.
Between 1951 and 1953, Henschel and Son built 21 more for the Rhodesia Railways (RR) and the Nkana copper mine in Northern Rhodesia.
In 1955, four more were built by NBL for the Wankie coal mine in Southern Rhodesia.
South African Class 19D 4-8-2