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Gardiner Houlgate, Corsham, February 19

Omega Speedmaster Ultraman chronograph, Ref 145012-67, c.1968.

Estimate: £15,000-25,000

Hammer: £18,000

Lyon & Turnbull, Edinburgh, February 19

A complete set (with the very rare unfinished seventh volume) of The Mineral Conchology of Great Britain by James Sowerby, 1846.

Estimate: £15,000-20,000

Hammer: £14,000

Chiswick Auctions, London, February 18

A blue and white ‘dragon’ stem cup with a six-character Xuande mark to the interior, 4in (10cm) high.

Estimate: £500-800

Hammer: £13,500


Duggleby Stephenson, York, February 14

Unsigned oil on panel sketch of Leda and the Swan, 9½ x 7½in (24 x 19cm) in the manner of Frederick Leighton.

Estimate: £70-100

Hammer: £6200

Acreman St, Sherborne, February 14

Qing ‘hundred boys’ vase, 14½in (37cm) high, damage to figures and defaced seal mark to base.

Estimate: £200-300

Hammer: £13,000

Bearnes Hampton & Littlewood, Exeter, February 19

A 19th century boxwood and ivory stethoscope, 10in (25cm) long, together with miscellaneous medical instruments.

Estimate: £80-100

Hammer: £2800

Source: Bid Barometer is a snapshot of sales on for February 13-19, 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

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