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Cheffins, Cambridge, January 9

First edition, first issue of Isaac Newton’s Opticks: or, a Treatise of the Reflexions, Refractions, Inflexions and Colours of Light, 1704, rebacked panel calf boards.

Estimate: £30,000-50,000

Hammer: £30,000

Elmwood’s, London, January 15

Cosmos ring by Van Cleef & Arpels set with round cut diamonds totalling 3.25cts, modern.

Estimate: £10,000-15,000

Hammer: £10,000

Bonhams, Edinburgh, January 15

Pair of Royal Crown Derby campana shape vases painted with sprays of garden flowers by Désiré Leroy, dated 1898, 6in (15cm).

Estimate: £1000-1500

Hammer: £6000


Gorringe’s, Lewes, January 13

Tibetan thangka depicting a nobleman surrounded by demons, 2ft 5in x 20in (73 x 50cm).

Estimate: £100-150

Hammer: £5500

Capes Dunn, Stockport, January 14

The Rainbow, Salisbury Cathedral, a mezzotint by David Lucas after John Constable, 21in x 2ft 3in (55 x 68cm), c.1829-32.

Estimate: £30-40

Hammer: £850

Chiswick Auctions, London, January 13

Oil on card Winter Landscape signed lower left for Václav Radimský (Czech 1867-1946), 2ft x 2ft 4in (60 x 71cm).

Estimate: £80-120

Hammer: £3600

Source: Bid Barometer is a snapshot of sales on thesaleroom.com for January 9-15, 2020.

‘Highest multiple over top estimate’ = Our selection of items from the top 20 highest hammer prices as a multiple of the high estimate paid by internet bidders on thesaleroom.com

‘Top selling lots’ = Our selection of items from the top 20 highest hammer prices paid by internet bidders on thesaleroom.com