310-Ebay locky666 not Egypt vehicle plate

In July 2014 locky666 from Germany was trying to sell this „Egyptian license plate“. It is probably from Egypt from the style but it is not a vehicle license of any kind.
The Arabic is D W – W A Y 50. Individual letters not words.
It could be from a boat (but I would expect it to be more rusty) or a house number or maybe some piece of public works infrastructure like an electric box or pole, a water valve, etc, etc.

Always check with the likes of Francoplaque if you don’t know the plates from a country you are thinking of buying.