Undated
J & K R
Seen on objects dated 1979–1989.
silver
Probably from Kingston-upon-Hull as this mark has been seen in conjunction with the three crowns mark of the Guild of Hull Silversmiths whose members have been allowed to use it.
Symbol guide
In a silver hallmark three crowns, Swedish silver can also carry an S, responsibility initials, a locality device and a letter-number date code.
This device differs from the three towers used in Danish marking. Swedish silver can also carry an S, responsibility initials, a locality device and a letter-number date code. The code belongs to the Swedish year cycle.
Copy the sponsor initials and fineness beside the device. If a date letter is present, match its case, lettering and surround to the identified office or national system. Keep each separate punch visible in the comparison photograph.