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 Nigel Shields at The Estate Office, Althorp, Northampton, Northamptonshire, Nn7 4hq
Emailing Nigel Shields:
Reporting A Data Error:
Reporting An Access Error to the HMRC:
A Louis XV white marble mantel clock
Maker:  Maker Unknown
A Louis XV white marble mantel clock, the movement by Maniere a Paris, with circular white enamel dial giving calendar indications enclosed in a case modelled as a seated Muse, reading, the oval base inset with ormolu plaques on ormolu dragon feet, 15in. high; 20 1/2in. wide.
Currently kept at: Althorp
THIS ARTWORK IS LOCATED IN:Northamptonshire
As per Althorp website. At other times by appointment through the contact point.