Christie's charge a buyer's premium of 20.825% of the hammer price for lots with values up to NLG 200,000. If the hammer price exceeds the NLG 200,000 then the premium is calculated at 20.825% of the first NLG 200,000 plus 11.9% of any amount in excess of NLG 200,000.
Anon. Sale, Frascati Amsterdam, 1 April 1919, lot 491, ill.
A Selection from Kunsthandel Pieter A. Scheen B.V. (Lots 185-218)
The Hague, P.J. Zürcher, Tentoonstelling van werken van Albert Roelofs, 1-30 June 1909. no. 26.