Antiques slideshow - a silver dial barometer and a 17th century portrait of a woman

Item one: Girl with St Bernard dog, mixed method engraving, proof on India paper signed by artist and engraver Charles Burton Barber (British, 1845 - 1894). The work of Charles Burton Barber is well liked by collectors of dog art and is still very collectable. The condition here is a problem: traces of staining, watermarks and foxing reduce value and desirability. Could be restored, but it would be expensive. Value: £50-80 Photograph: Michael Smith Item two: A mahogany and brass mounted wheel aneroid barometer with engraved silvered dial. Made circa 1840-1860 and often imported from the continent. The engraved house on the dial might depict the owner's ancestral home. Because these are common instruments, prices are usually less than £200, but good signed Georgian examples usually make high hundreds. The excellent condition and interesting provenance of this barometer could beat the usual low prices and fetch £400 - £600. Photograph: Mary Sayers Item three: Folding map of Surrey on linen, hand coloured engraving, published by James Wyld (1812 - 1887), London. It comes with the original cloth slipcase with publisher’s label inscribed for collector Edwin Martin Atkins. But this is not an uncommon map and currently undervalued. Could fetch £60 - £90 but worth hanging onto or even buying at this stage. Photograph: Stephen Bound Item four: A pair of ebonised wood and chromed steel easy chairs, with roll cushion backrests upholstered in white leather or vinyl, probably Italian . Appear to be from early 1970’s. The low, sleek forms and the roll cushions are reminiscent of the designs of Joe Colombo and his contemporaries. An attribution to a known maker or designer would certainly raise the value as these are very stylish pieces. Check the underneath and even inner construction for potential labels, stamps or reference number. Value: £1,000 - £1,500 Photograph: Rowan Blades Item four: Oil on canvas portrait of a young woman . Could be by Nicolas Regnier (1590-1667), who trained in Rome and settled in Venice. The image could be possibly of a saint. With a strong old master market, a painting of this type would be highly sought by both trade and private buyers. A fine example of 17th century art. Value: £10,000-£15,000 Photograph: Virginia Lopez