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.
Please note the following provenance and literature:
Anon.sale, Rosen Berlin, 18 november 1957, lot 19, with ill. p.4.
D.C. Ewing, The Paintings and Drawings of Jan de Beer, unpublished dissertation, 1978, p.308, no.27, p.438, fig.74, as by a close associate of Jan de Beer.