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Rare Davon Single Draw Micro-Telescope Early 20th Century. Designed for multiple uses including the taking of photographs through the main Objective, it proved more useful as a low-power terrestrial telescope rather than an astronomical one. Because it was capable of being deployed over very considerable distances and could be very precisely focused by use of the rack and pinion with the barrel-mounted wheel, some were actually used as trench telescopes during the First World War and were marked with War Department Arrows if they were issued for this purpose.Rare Davon Micro-Telescope Early 20th CenturyFor a full description of this remarkable scientific instrument, please see:Davidson, F. (1920) The Davon Patent Micro-Telescope and Super Microscopic , Journal of Microscopy Vol.40 Issue 4 December 1920 p.219 doi: 1111/j. 1365-2818. 1920 tb06148. John Wileyand also:Risdon, P.J. Microscope and Telescope Too Popular Science Monthly Vol.98 No.5, May 1921 p.60
Makers marks:F. DAVIDSON & Co.PATENT No13251 – 12LONDON W.
* Outstanding condition. All fixtures present.* Original leather case. All buckles & straps intact.* All Lenses in perfect condition.* Eyepiece fitted with No. 5 lens.* Lenses No. 2 & No.6 present in case.* Brass tube construction with stitched pigskin covering.* Black anodised finish to all metal parts.* Achromatic 1.25 Objective / Field Lens* Adjustable Brass Tripod * Additional threaded tree / woodwork mount.Defects: No major defects. Slight paint losses to black anodised sections. Some slight scuff marks and age-related discolouration and minor shape distortion to leather case, buckles and straps but overall they are in excellent condition for the age. Small losses to rim of rubber casing for one of the spare lenses.Weight: (Including case: 1.692kgIt will be carefully packed and insulated to our usual high standards for fully insured shipping worldwide. Only actual postal costs will be charged. Overseas buyers are therefore requested to way for an Invoice before paying. Any excess postal costs paid will automatically be refunded.
Category: Cameras and Photography:Telescopes and Binoculars:Telescopes
Location: Guildford, Hampshire
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