Imperial German Kriegsmarine / Colonial - Identification buttons

[Claudio]

Dear forumites,

 

I'd like to submit to your expertise some buttons my brother was able to acquire.

 

The larger buttons to the left are to me not known. They look surely Imperial German and might be Colonial, see the sun on the background.

 

Any thoughts?

Thanks in advance for your most appreciated inputs and comments.

 

Cordially,

 

Claudio