View full screen - View 1 of Lot 2. A GILT-BRASS COMBINED NOCTURNAL AND HORARY QUADRANT, UNSIGNED, ATTRIBUTED TO THE WORKSHOP OF GIOVAN BATTISTA GIUSTI, FLORENCE, CIRCA 1565.
2

A GILT-BRASS COMBINED NOCTURNAL AND HORARY QUADRANT, UNSIGNED, ATTRIBUTED TO THE WORKSHOP OF GIOVAN BATTISTA GIUSTI, FLORENCE, CIRCA 1565

Estimate:

8,000 - 12,000 GBP

A GILT-BRASS COMBINED NOCTURNAL AND HORARY QUADRANT, UNSIGNED, ATTRIBUTED TO THE WORKSHOP OF GIOVAN BATTISTA GIUSTI, FLORENCE, CIRCA 1565

A GILT-BRASS COMBINED NOCTURNAL AND HORARY QUADRANT, UNSIGNED, ATTRIBUTED TO THE WORKSHOP OF GIOVAN BATTISTA GIUSTI, FLORENCE, CIRCA 1565

Estimate:

8,000 - 12,000 GBP

A GILT-BRASS COMBINED NOCTURNAL AND HORARY QUADRANT, UNSIGNED, ATTRIBUTED TO THE WORKSHOP OF GIOVAN BATTISTA GIUSTI, FLORENCE, CIRCA 1565


the top of the quarantal plate symmetrically cut with double scallops rising to a suspension ring mount and engraved with scroll-ended outline decoration and line hatching.


Face I.

A nocturnal with a month scale in two rings and divided into three days, placed around the central sighting hole. Within this is a volvelle cut with triangular teeth numbered 1-15 for the hours of darkness in the Italian hour reckoning which begins at sunset. Each hour is subdivided to twenty minutes. A second volvelle carrying the index arm is mounted above the hour dial. below is the punched inscription HOROLOGIUM. NOCTIS. AD. STELLAM. POLI. ET AD. DVAS. VLTIM. STE. URE. MA: (A night dial for the Pole star and the two guards of the Great Bear).


Face II.

Engraved in the apex with a solar course diagram marked MOT[US] SO[L]IS and composed of three concentric arcs, the interior two with twelve divisions, the outer with twenty-four. The latter with the initial letters of the signs of the zodiac, the second with those of the months and the innermost with a sequence of numbers between 3 and 9. The three arcs used together offer a rapid means of find the degree and sign of the zodiac of the sun for any date of the year; (for a description of the method of use see Turner A, p. 10). The figure 14 placed above the scale is the latest date for the period that the sun can enter a new sign. Beneath this scale is the diagram for an altitude sundial in Italian hours (5-23) without sub-divisions, the morning hours being indicated by smooth lines, the afternoon hours by dotted lines and to each side are the two halves of the calendar scale requisite for its use. to the top right is the inscription QVADRANS. MENSORIUM, ET,DIEI. HORARIVM AD. ALTIT. POLI G. 43 (a quadrant for the months and hours of the day at the latitude of 43 degrees). The limb is marked with a degree scale reading to 90 degrees by 1 degree divisions numbered by groups of ten and with the corresponding shadow square.


15 cm. high


Please note: Condition 11 of the Conditions of Business for Buyers (Online Only) is not applicable to this lot.


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In very fine condition throughout and retaining the original gilding. Plumb line replaced and bob may also possibly be a replacement. some very minor surface marks and scratches commensurate with age.


The lot is sold in the condition it is in at the time of sale. The online condition report is provided to assist you with assessing the condition of the lot and is for guidance purposes only. The images of the lot also form part of the online condition report for the lot provided by Sotheby's. Any reference to condition in the online condition report does not amount to a full description of condition. The online condition report may make reference to particular imperfections of the lot but you should note that the lot may have other faults not expressly referred to in the online condition report of the lot or shown in the online images of the lot (for example, the online condition report may not specify mechanical replacements or imperfections to the movement, case, dial, pendulum, separate base(s) or dome). Watches in water-resistant cases have been opened to examine movements but no warranties are made that the watches are currently water-resistant. The online condition report may not refer to all faults, restoration, alteration or adaptation because Sotheby's is not a professional conservator or restorer but rather the online condition report is a statement of subjective, qualified opinion genuinely held by Sotheby's (for example, information regarding colour, clarity and weight of gemstones are statements of opinion only and not statements of fact by Sotheby's). Please also note that we do not guarantee the authenticity of any individual component parts, such as wheels, hands, crowns, crystals, screws, bracelets and wrist bands, since subsequent repairs and restoration work may have resulted in the replacement of original parts. In addition, certain images of the lot provided online may not accurately reflect the actual condition of the lot (for example, the online images may represent colours and shades which are different to the lot's actual colour and shades). For these reasons, the online condition report is not an alternative to taking your own professional advice regarding the condition of the lot. Prospective buyers should also refer to the Buying at Auction guide which includes important notices concerning the type of property in this sale. In particular, please note it is the purchaser's responsibility to comply with any applicable import and export matters, particularly in relation to lots incorporating materials from endangered species. Please be advised that wristbands made of materials derived from endangered or otherwise protected species (i.e. alligator and crocodile) are not sold with the watches and are for display purposes only. We reserve the right to remove these bands prior to shipping. NOTWITHSTANDING THIS ONLINE CONDITION REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS (ONLINE ONLY)

Turner, Anthony J., Instituto e Museo di Storia della Scienza: Catalogue of Sundials, nocturnals and related instruments, Florence 2007, No. 9, 10, 33, 34.

Turner, Gerard l'E, 'The Florentine Workshops of Giovan Battista Giusti, 1556-c.1575', Nuncius. Annali di Storia della Scinza, x, 1, 1995, 151-72. 

Although this dial is unsigned, the use of Italian hours, the general layout of the instrument and the latitude of 43 degrees (appropriate for southern Tuscany and the Reggio region of Umbria), all suggest an Italian origin. This is confirmed by the similarity of many of the punches used with those found on instruments from the workshop of Giovan Battista Giusti (fl. third quarter of the 16th century) Nothing is known about Giusti although some signed instruments by him have survived (eg. two quadrants, dated respectively 1565 and 1568 in the Museo Galileo, Florence), and to whose workshop several unsigned instruments have been attributed.


Sotheby's would like to thank Anthony Turner for his help in cataloguing this lot.