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 Bloor Derby two-handled oviform vase
Maker:  Maker Unknown
A Bloor Derby two-handled oviform vase, painted with a view of Spencer House on a green ground within gilt acanthus leaf borders, on a circular base with three scroll feet (restored), 12 2/3in. high.
Currently kept at: Althorp
THIS ARTWORK IS LOCATED IN:Northamptonshire
As per Althorp website. At other times by appointment through the contact point.