Condiment set

I have Sterling Silver set of salt, 1pepper & mustard condiment set containing of six pieces with 4 spoons. The stamps reads MNWB with an anchor, lion and a D. Under each piece have a number stamped, Ro No 735484. Each piece is between 3,5 cm and the pepper and salt pots is 8 cm high. Two of the pieces have a lid. The set is stored in a box 19x23 cm and 7 cm high marked Mappin & Webb Ld.