Hi,
Frisian silver decorative spoon, eighteenth century.
On the end of the spoon handle, the finial, symbolic representation of Wisdom.
Wisdom, the representation shows a woman holding up a mirror in her right hand, turned towards the viewer. In literature this representation is often referred to as Prudence or Prudentia. In her left hand she probably holds a Remora, a snake-like fish. In Naturalis Historia by Pliny The Elder (AD 23/24–79) this snake-like fish from the family of the Echeneidae is described "where it attaches itself to ships and thus slows down their speed". The stem finial in fact shows self-knowledge and not acting hastily as aspects of Wisdom

To my knowledge the maker's mark MN in monogram/ conjoined in oval is of an unknown master, active Leeuwarden 1734.
Peter.
Source; Jan Schipper, Friese zilveren sierlepels uit de achttiende eeuw en Zilverstudie.Nl