Can you identify this uniform

[easterneagle87]

Seller says this uniform is Swedish. Swede's usually have three crowns on the buttons. 

 

 

[Proud Kraut]

Could it be Danish?

[Mr.Jerry]

I have been trying all of my hoodoovoodoo but still no positive ID.  I think the button is Pioneer (engineer)

can we see the rest of it? any tags?

[JohnKris]

Crown looks Danish. Danish Engineers or Sappers. https://en.wikipedia.org/wiki/Engineer_Regiment_(Denmark)

[Marshallj]

I also say Danish. My guess is different units had different buttons. Here is a picture of another Danish uniform and the shoulder board is the same but the buttons are different than yours. 

[Woldw1woldwa2]

It is definitely a Dutch uniform I can tell by the buttons. It looks like evening dress 

By the hat