930 ALCO locomotives.  These are modified old IBERTREN models and repainted into the maroon and silver livery and decals applied.

SAR 830 locomotives.  Peter Boormans Workshop produces a very nice brass kit that requires some skill to assemble but the result is worth the effort.  Image ABOVE shows 2 kits near completion before painting and decaling and image BELOW shows completed model painted in SAR Mustard Pot livery.