You will need to contact the owner's representative to arrange access.
In the case of this object this can be done by:
Writing to Mr James Carleton at Farrer & Co, 66 Lincolns Inn Fields, London, Wc2a 3lh
Reporting A Data Error:
Reporting An Access Error to the HMRC:
A Flemish ivory and silver tankard
Maker:  carvings, Ivory
Description: 
Ivory carvings: A Flemish ivory and silver tankard, the cylindrical body carved in relief with putti, flying birds, gathering fruit and surrounding a fire, the cover and base with repousse scrolls, grotesque mask thumbpiece and moulded scroll handle, surmounted by a putto riding a sea-monster - 7 1/4in. high, 19th century (?)
ID:  78218