86
85
238
225
239
82
237
82
240
237.
AN EARLY 19TH-CENTURY 1¼IN. THREE-DRAW TELESCOPE SIGNED RAMSDEN, LONDON
with nickel-plated tubes signed as per title, wooden main tube, contained within original wood and leather container (optically impaired) -- 7¾in. (19.5cm.) high
£80-120
238.
A 1IN. SINGLE DRAW ACHROMATIC MARINE TELESCOPE BY PETER DOLLOND, LONDON, CIRCA 1765
the slightly-tapered mahogany tube with single draw signed by the tapered eye-piece P. DOLLOND / Strand / LONDON, objective dust slide -- 31in. (79cm.) closed
Peter Dollond (1731-1821) worked from two addresses in the Strand between 1752 and 1766. He improved on the invention of the achromatic lens (which corrects chromatic aberration) with his ‘apochromatic’ lens in 1763, which corrected both colour and spherical aberration.
£300-500 239.
A 1½IN. SINGLE-DRAW MAHOGANY AND BRASS MARINE TELESCOPE BY DOLLOND LONDON
lens cap with dust slide, shade slide, signed and inscribed by the tapering eyepiece Dollond London. / Rep.D by C. Shepperd / 53 Leadenhall St London 1867 / Dunn, Edinr., closed length -- 21½in. (54.5cm.)
Although made by Dollond, this telescope is unusual in that it bears the signatures for no less than three makers and because Charles Shepperd dated his repair to 1867 we know that Thomas Dunn of 100 George St Edinburgh was a retailer. Interestingly Shepperd is listed as working at this address between 1846 to 1858, so whether this was repaired by him in retirement for the successors (Shepperd & Son) is open to speculation.
£150-250 240.
AN EARLY 19TH-CENTURY 1IN. THREE-DRAW MAHOGANY AND BRASS POCKET TELESCOPE BY DOLLOND, LONDON
with objective cap signed by eye-piece with dust slide, as per title, and contained in original shark skin-covered storage tube -- 5½in. (14cm.) high
£80-120 238 (detail) 88 additional images online at
www.charlesmillerltd.com
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