Christie's technician looks at 'Portrait de fillette sur fond bleu' by Pier...

Christie's technician looks at Le Baiser by Auguste Rodin during a press pr...

Christie's technician looks at Le Baiser by Auguste Rodin during a press pr...

Christie's technician looks at Le Baiser by Auguste Rodin during a press pr...

Christie's technician looks at Untitled No. 7 by Paula Rego during a press ...

Christie's technician looks at The Skin of Our Teeth by Cecily Brown during...

Christie's technicians look at Selbstbildnis (Self-Portrait) by Franz Gerts...

Christie's technicians look at Selbstbildnis (Self-Portrait) by Franz Gerts...

Christie's technicians look at Start Over Please by Ed Ruscha (right) and U...

Christie's technicians look at Start Over Please by Ed Ruscha (right) and U...

Christie's technician looks at Untitled (Cowboy) by Richard Prince during a...

Christie's technician looks at Untitled (Cowboy) by Richard Prince during a...

Christie's technician holds Ria, Naked Portrait by Lucian Freud during a pr...

Christie's technicians hold Ria, Naked Portrait by Lucian Freud during a pr...

Christie's technician looks at Balloon Monkey (Blue) by Jeff Koons, display...

Balloon Monkey (Blue) by Jeff Koons is displayed in St James's Square durin...

Balloon Monkey (Blue) by Jeff Koons is displayed in St James's Square durin...