It is most likely the maker's initials.
NB or N&B could stand forNeustadt & Barnett, who were ring-makers from Birmingham in the UK in 1839.
If there is an SN somewherearoundthe NB, it was made byN B & Sn in 1941, London, UK.
It could also be theNayler Brothers (1926-1988).
Or maybe Needham Brothers (1901-1917).
The best way to get a proper definition of the NB is to ask aprofessionaljeweller.
Nb is the chemical symbol of niobium.
The marking "nb-14k" on a ring typically indicates that the piece is made of 14-karat gold, with "nb" possibly representing the manufacturer's initials or a specific design code. The "14k" signifies that the gold content is 58.3% pure gold, with the remaining alloy made up of other metals for durability and color. This marking helps identify the quality and authenticity of the gold used in the jewelry.
NB stands for Nominal Bore.
Niobium
Nickel Back
I am not quite sure what you mean by "nb", but I don't think it's a unit of length.
I suspect that NB stands for the Latin phrase nota bene,whick means 'note well'.
nb nb kj:)
NOTA bENE
925 on a ring mean
WHAT DOES 14KUD MARK ON A RING MEAN ?????????
what does Thailand mean stamped in a ring