The sponsor's mark, fineness mark and the assay office mark are compulsory marks. The crown on gold, the lion passant for 925 silver, the Britannia mark for 958 silver and the orb for 950 platinum and the date letter in all cases are voluntary additional marks.
UK Hallmarks
Hallmarking Services
Hallmarking
UK Hallmarks
Hallmarking - Getting Started
Lasermarking
Mixed Metal Marking
Control Marks
Convention Marks
Platinum Jubilee Commemorative Mark
Dealer's Notices
Daily Collection
Private Assays
Hallmarking Act 1973
Hallmarking Charges
Early Hall & One Hour Services
Authorisation for Change of Use
Assay Note
Hallmarking Terms & Conditions