Signed "Dobbie McInnes ltd, Greenock, Glasgow, London and So Shields". Air compass, painted brass bowl, suspended in brass gimbals. Simple mahogany square box 142mm high. ca 1880. Rough and weatherbitten at present, would polish up beautifully.
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Predecessor to the slide rule,Edmund Gunter (1581-1626) was behind this 2ft instrument used to calculate angles. signed John Rabone & Son, ca 1800
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Cail Newcastle on Tyne, nickel, ebony and ivory rolling navigational rule 470mm. Bone walking stick 860mm
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Log timers, 14 and 28 seconds.height 94mm
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Brass sextant, silver scale, signed "J. Somalvico & Co, London" and numbered 583, radius 235mm. In beautiful shaped mahogany box labelled Henry Porter, 181, Strand, London. "Adjusted June 1888"
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Nickel on brass, Norwegian text, radius 205mm, ca 1950
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Heath & Co, London SE9. 8 days 200mm diam.
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Wood and brass, with sunshade. Length extended 950mm. Signed "W. Dowling, London Imp.d Day or Night". Both slides to eyepiece and objective intact. ca 1830
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Brass, nicely braided decor on main draw, with sunshade, length extended 810mm, ca 1880
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