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Mechanical music is always popular, and if it's an early forerunner of the jukebox, as this coin-operated Fortuna music box in its walnut case most certainly is, then you're talking very decent money indeed. Clevedon Salerooms have expectations of up to £1,800 for this one, along with 20 of its 16-inch discs, in their specialist sale on June 18.

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Among medals on offer at Dreweatts 1759 Bristol's militaria sale at Apsley Road on Tuesday is this Military General Service gong for service in the Napoleonic Wars between 1793 and 1814, with clasps for Toulouse, Orthes, Nive, Nivelle, Pyrenees and Vittoria. Awarded to Patrick Connor of the 88th Foot, it carries a pre-sale estimate of £1,000 to £1,500, and Irish interest should be intense. The 88th Foot (Connaught Rangers) were one of eight Irish regiments of the British Army and were known by some as "The Devils Own" for their devastating bayonet charges and hand-to-hand fighting.

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This is Olga Davenport, South African-born painter and socialite who was also a bit-part actor in British films in the middle years of the last century. She died last year, well into her nineties, and it is Woolley and Wallis's happy task to sell some of her jewellery at their auction in Salisbury on Thursday. Most of the pieces are formal, theatrical and opulent, dating mainly from the Victorian era. The amethyst rivière necklace she is pictured wearing here, for instance, is estimated at £1,000 to £1,500, while the centrepiece of her collection, a sapphire and diamond brooch given to her by her economist husband Nicholas on her 50th birthday, could go as high as £15,000.

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One of several stars of Simon Chorley's auction at Prinknash Park on Thursday is almost certain to be the stunning Emile Gallé vase seen here. It carries an estimate of £1,500 to £2,000, but when it comes to this idol of the international Art Nouveau market, almost anything can happen. Translucent in purple, ochre and dark green glass, with a decoration of hazy mountains and dark fir trees, it is a classic Gallé piece, prominently signed. From his workshops in Nancy in France, he experimented with a variety of techniques to create glassware in organic forms, with nature as his inspiration. His cameo glass technique, etching into two or more layers to reveal a design in one colour against a contrasting background, was his major innovation, and one he was able to capitalise on through mass production.

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This rare merino ram is one of the highlights of Charterhouse's auction of Beswick and Royal Doulton in Sherborne on May 22. "This is one of the rarest Beswick sheep produced," says the auctioneers' Naomi Grabham . "It was available only from 1964 until 1967 – quite a short run, when you consider they made some of the lambs for more than 40 years." Designed by Arthur Gredington in 1963, the figure is estimated at £1,000 to £1,500.

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Royal and Napoleonic memorabilia will be to the fore at Oaks and Partners' sale at the Old Tannery in Cullompton on May 29, when they are selling the contents of a big country house near Exeter. The 500 lots include the late Mrs Frances Pratt's lifetime collection of period furniture, as well as family heirlooms such as emblems, in the form of a bee and a crowned eagle, from the cloak of Napoleon. Seen here, however, is a fine gold, enamel and pearl pendant or brooch that belonged to Mrs Pratt's great-aunt, Jane Allin, who was lady- in-waiting to Queen Victoria's grand-daughters, Princesses Margaret and Victoria Patricia. The reason for its presentation is not certain, but on the back we read: "To Jane Allin From Her Majesty Queen Victoria September 29th 1882."

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Dominic Winter's Cayley to Concorde sale at South Cerney on May 14, celebrating the 100th anniversary of Bleriot's first flight across the English Channel, will include this selection of vintage propellers, with lots estimated at £800 to £2,200. The salerooms' Lynne Shipley gives us some idea of just how big these double-blade props were, while a brass-tipped mahogany four-blader from World War I is another substantial lot. Made by Davis Bennett and Co, it is estimated at £1,500 to £2,000.