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 walnut longcase clock
Maker:  Maker Unknown
A walnut longcase clock, the movement by Benj. Gray and Just. Vulliamy, London, the square dial with silvered chapter ring within chased ormolu spandrels with calendar aperture, the case with turned columns to the hood, third quarter, 18th century, the top and base altered.
Currently kept at: Althorp
THIS ARTWORK IS LOCATED IN:Northamptonshire
As per Althorp website. At other times by appointment through the contact point.