This engine is the mamod SE2 version that was built between 1948 and 1950.
There are a few things that I will have to fix on this engine. It seems like the baseplate and firebox have been repainted, so I will probably go for a full restoration. The engine frame is painted black, so that has to be repainted anyway (should be green).
There's also a problem with the whistle, it spins around freely in it's bush, so the bush needs to be resoldered. Luckily it's still quite tight fixed in there, so I was able to get the engine running. It's a great runner!