WGL 1200 1201Den Haag Hollands Spoor Den Haag Hollands ..

What is WGL?

"WerkGroep Loc 1501", it's a Dutch museumorganisation

See this link for more info
http://en.wikipedia.org/wiki/NS_Class_1200

Is it a pre-paint state or some special livery?

This is the livery, as by delivery in the year 1950 by Werkspoor in Utrecht, whitout the blue-line which the loco has in 1952 when it's in service by the Dutch Railways