Dutch, N.K. & K.M., Rotterdam Seal

Dutch, N.K. & K.M., Rotterdam Seal, Image & Found by Herman Vos.
Found in Vinkeveen, Netherlands, 16mm.

N.K&K.M.5 pointed star circular inscription // ROTTERDAM cross potent circular inscription

the NK & KM are likely to be the initials of two names but no product, company or organisation has yet been associated with this seal.