Unusual Item with several marks

[Dolphin Girl]

Hope someome can help first tell me what this might be used for, heard maybe an asparagus server? Also not shown are two marks on the bottom of the piece - one is a unicorn head and the other is a pair of crossed keys. The small section of worn hallmark I believe is S.S inside of an oval, but only part of that section is readable. the inside piece is removable.

[Dolphin Girl]

Do my photos need to be better?

I am pulling my hair out over this - Anyone please!

[Dolphin Girl]

So far, this item has stumped not only this forum, but another as well. Maybe this will help - I have since discovered that the engraving on the lid is more than likely a coat of arms or family crest.
Hope this helps spurr some response.

[admin]

It may help if you supply an image of the marks not shown.

[Dolphin Girl]

The marks on the bottom of the piece do not photograph at all. They are simple marks - pair of crossed keys and a unicorn head - not next to one another (separate) and not framed in any shape. Just that - simple.