Lot 35
35
A fine 17th-Century brass universal equinoctial ring dial,
No VAT will be charged on the hammer price, but VA… Read more
A fine 17th-Century brass universal equinoctial ring dial,

Details
A fine 17th-Century brass universal equinoctial ring dial,
signed Koch in Wieñ, the meridian ring with sliding throne with sprung tension supports and suspension loop, engraved with one quadrant graduated 0°-90° and the names and latitudes of twelve continental cities and towns on both sides, one side of the equinoctial ring with a further eight towns and latitudes on one side and graduated on the other with hours I - XII (x2), the bridge with calendar scale on one side and Zodiac scale on the other, with sliding pin-hole sight -- 2 7/8in. (7.3cm.) diameter

See Colour Illustrations
Literature
ZINNER, Ernst, Deutsche und niederländische astronomische Instrumente des 11.-18. Jahrhunderts (Munich, 1972)
Special notice
No VAT will be charged on the hammer price, but VAT at 17.5% will be added to the buyer's premium which is invoiced on a VAT inclusive basis.

Lot Essay

TABLE OF LATITUDES
Offen 45
Prag 50
Bresslau 52
Rom 41
(Koch in) Wien 48
Augsp:Regens 48
Baris 48
Gräz 47
Jerusalem 32
Venedi 45
London 51
Cöln 50
Laudau Zaürch Bern Lucern 47
Basel Colmar Constant 48
Geneve 50

Zinner lists Johann Köch (d.1679) as working variously in Cologne, Vienna, Berlin and Stockholm.

More from EXCEPTIONAL SCIENTIFIC AND ENGINEERING WORKS OF ART

View All
View All