You will need to contact the owner's representative to arrange access.
In the case of this object this can be done by:
Calling Wendy Philips on 020 7293 6184
Writing to Wendy Philips at Sotheby's, Tax & Heritage Dept., 34-35 New Bond Street, London, W1a 2aa
Reporting A Data Error:
Reporting An Access Error to the HMRC: