bowl with brass footings and cobalt blue and gold black triangle with 038 inside

 I have this item I got in an large estate sale, it was burried in some clothes. I can not seem to find any info on-line about this item, I do not know any history on it. It is in pretty good shape, no chips, good color. The only mark on this is a black triangle with the numbers 038 inside it. I looked for this on-line, but can not seem to find an exact reference.

I have no idea what this is worth - my partner seems to think it could be from the 1700's and worth like 500 - but I like facts anyone have any idea what this is worth? I have another box that matches this - is is the same pattern with a hinged lid and it is rectangular, and has a red triangle with 047 inside it.

Any help would be great!

Craig