A SURVEYING QUADRANT BY JOHN WILLIAMSON, WHITEHAVEN, CIRCA 1775
signed on the arc as per title, the vertical radius inscribed for baseline and differential latitude, the index arm inscribed Hypothenuse Distance Index, the upper limb with two holes to locate a sight -- 14¼in. (36cm.) overall; together with a brass 'T' square, apparently by the same hand -- 14in. (35.5cm.)
(2)
Sold for £2,728
Estimated at £800 - £1,000
(inc. buyer's premium of 24%)
A SURVEYING QUADRANT BY JOHN WILLIAMSON, WHITEHAVEN, CIRCA 1775
signed on the arc as per title, the vertical radius inscribed for baseline and differential latitude, the index arm inscribed Hypothenuse Distance Index, the upper limb with two holes to locate a sight -- 14¼in. (36cm.) overall; together with a brass 'T' square, apparently by the same hand -- 14in. (35.5cm.)
(2)
Auction: Maritime and Scientific Models, Instruments & Art (GLADIATOR), 25th Apr, 2023
59
Page turning catalogue here
Downloadable bid form here
Saleroom notice here
Order of Sale:
Mercantile (Sail & Yachting) 1-75
Mercantile (Steam) 76-132
Naval (Sail) 133-237
Naval (Steam) 238-294
Navigational & Scientific Instruments 295-353
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