Doublet

[CMcG]

I found this while exploring evening wear options. Maybe with jabot and cuffs? Diamond-shape buttons?

As OC Richard has pointed out, this style of jacket has a very military/police association with it. As Chas has said, it would be more suitable for evening wear without those pockets. I will add that if it came in a material like barathea, moleskin, or velvet, it would also help to make it more suitable for evening wear. I don't think a jabot and cuffs would quite work with this jacket because they are top shelf, traditional formal accessories and this jacket doesn't quite fit the mould. You could put diamond buttons if you wish, but I don't think it would be necessary.