拍品 141
141
A German ebonised eight day wall regulator
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A German ebonised eight day wall regulator

J.D.THIES, HAMBURG, NO.5, THE MOVEMENT BY F. DENCKER. LAST QUARTER 19TH CENTURY

細節
A German ebonised eight day wall regulator
J.D.Thies, Hamburg, No.5, the movement by F. Dencker. Last quarter 19th Century
The rectangular moulded case with sliding hood secured to the sides with brass screws, the trunk also sliding forward and secured with three brass screws to each side, both sections glazed to the front, the panelled backboard with large adjustable brass positioning screws to the top, the bottom with brass-headed securing screws, the 8¾ in. square silvered and engraved dial of regulator format and signed J.D.Thies Hamburg/No.5 (stoning behind J.D.Thies indicating alteration, probably at the time of manufacture), all hands of blued steel and with winding through the hour hand, the movement with tapering plates secured to the dial with steel screws and joined by four double-screwed pillars, small stamp F.DENCKER/HAMBURG to top of back plate, wheels with five crossings, maintaining power, dead beat with adjustable pallets, with fine adjustment and sliding hook locking device to the crutchpiece also with anti-friction roller, connecting to steel rod and jar pendulum suspended from a substantial brass bracket on the backboard; brass weight, ivory-handled crank key, case key
52¾ in. (134 cm.) high
注意事項
No VAT will be charged on the hammer price, but VAT at 15% will be added to the buyer's premium which is invoiced on a VAT inclusive basis.

拍品專文

COMPARATIVE LITERATURE:
Derek Roberts, Precision Pendulum Clocks: France, Germany, America and recent Advancements, Schiffer, 2004, pp.192-193, figs.35-3a-d; Klaus Erbrich, Präzisionpendeluhren, Callwey, 1978. pp.158-159.
A little known chronometer maker from Hamburg, Johann Diedrich Thies is recorded in the winter of 1880-81 as having entered two chronometers in the trials at the Deutsche Seewarte. His address was given as Neierwall 24 and Posterstrasse 1.
F. Dencker (c.1835-1909) was co-founder of the Chronometer Werke GmbH, Hamburg in 1905 and was its first technical director. For a short period in the 1870s he was in partnership with Theodor Knoblich.
Dencker's regulators are typical Hamburg or Altona style and based on Kessels' design. Erbrich (pp.158-159) illustrates a similarly designed regulator by Knoblich, Altona (No.1808) and Roberts (pp.192-193) shows another, Dencker No.26.