NEED HELP: I.D, uniform in photo/ painting

I bought this this pass year and trying to i.d. the uniform on the right. It looks like this is a family phto with the father in the middle and his two sons. I know the one is navy, but curious to what uniform the other son is wearing.
Attachment 285753
Attachment 285754

I appreciate any help,

Click to enlarge the picture



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