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Embossed with a classical female figure holding aloft a laurel branch, this silver medallion commemorates the 1923 Yorkshire Automobile Club Speed Trials – held across the miles of hard, flat sands at Saltburn-by-the-Sea.

The medallion appears to have been presented to CP Hare, who took part in the Committee Race on June 16, reaching a speed 46.22mph. The piece is guided at £200-400 in David Duggleby’s sporting sale in Scarborough on May 6.

davidduggleby.com

The Performing Sea Lion, a Lehmann tinplate clockwork novelty toy, is included in Fellows’ May 9 sale in Birmingham.

Estimated at £200-300, it is in good overall condition and comes in an original box.

The popular toy was made in Germany from 1899-1935. Each seal measured 7½in (19cm) long, had whiskers and a bell and could move across the table when wound up with a key.

fellows.co.uk

Clarke’s Auctions of Semley in Dorset is offering this 1970s Jean Muir cinnamon coloured dress on May 13.

Muir (1928-95) first worked for Liberty & Co in 1950 before moving on to work as a designer for Jaeger. With her husband Harry Leuckert, she set up Jean Muir Ltd in 1966 and was made a Fellow of the Chartered Society of Designers in 1978.

Made from soft suede, the piece is a rare example of Muir’s use of the material in her dress designs.

Estimate £80-120.

clarkes-auctions.co.uk

Hampshire auction house Hannam’s has high hopes for this unassuming green trunk formerly owned by Field Marshal Alan Francis Brooke (1883-1963).

A senior officer of the British Army, Brooke began the Second World War as a commander of the II Corps in France before being promoted to Chief of Staff by Winston Churchill and becoming the prime minister’s foremost military advisor.

Brooke’s war diaries expose the clashes between the pair and attracted attention for their criticism of Churchill and for his forthright views on other leading figures of the war.

Consigned directly from Brooke’s estate, the 3ft 6in (1.07m) long two-door trunk is estimated at £300-500 in the May 4-5 sale.

hannamsauctioneers.com