ENGLISH (OMN) nat by National Glass Company (McKee & Bros. Works) (Jeannette-PA, Operated: 1899-1904), c1904
NOTE: Karen Welch 2021 - National Glass/McKee shows two pieces in their 1904 catalog which are described as "English Cream" and "English Jelly Bowl" that mirror very closely the shapes you would see for British creamers and sugar basins.
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Shape: Catalog Cut/Ads
Contributor: Karen Welch - 1904 catalog

Shape: Catalog Cut/Ads
Contributor: Karen Welch - 1904 catalog