The napkin ring features a beautiful Gothic D monogram in an oval lozenge, with a band of leafy engraving continuing on each side.  There are parallel bands of wavy decoration on either side of this wider central band.

Opposite the D monogram, the napkin ring is stamped for the Harford Case Co (I can just make out enough of this to think this is the maker); Birmingham's assay anchor; the lion passant; and the date letter for 1914.