Hi Miles,
If you think you have a problem with six, then spare a thought for James Mortimer Garrard. In 1893 he was given the task of cataloguing the Duke of Portland's collection of silver. One of the pieces he had to detail was a silver tea table engraved with seventy-two coats of arms.
The tea table is thought to have been the work of Edward Holaday (Grimwade 1041). It weighs 80 oz. It has no date mark.
Source:
A Catalogue of Gold and Silver Plate, the property of His Grace the Duke of Portland, with pen and ink sketches of the arms, crests, and mottoes, and full description, and date of each piece. By William John Arthur Charles James Cavendish-Bentinck Portland (Duke of), James Garrard - 1893
Trev.