That looks more an Asian scene to me.
The reg could perhaps be Brunei.
Burma was also white on black, one serial letter followed by 4 numbers - except they used Burmese characters...
Indonesia was also white on black, 1 letter followed by 4 numbers, but there was no W..
Malaysia was exactly the same, and again no W.
I was wrong about the Windward Islands by the way: Each Island had its own code, so WD was Dominica, WG Grenada, WL St Lucia and WV St Vincent!