Unsigned

• rectangular silver plate engraved at one end with hour scale divided IIII-XII-VIII, hinged brass gnomon adjusted for latitude and with engraved latitude scale. The opposite end of the plate bears an azimuth dial with an elliptical hour scale, vertical gnomon adjustable for solar declination against calendar scale, supported by brass leveling screws, unsigned
• together with a gilt-brass equinoctial ring dial, circa 1700 ring dial, made for use in Northern latitudes (2 pieces) unsigned, German

Sotheby's London December 15th, 1978, lot 13
Time Museum Inventory No. 1568
Sothebys' New York,Time Museum, October 13th and 14th, 2004, lot 788

Time Museum Inventory No. 1695
Sothebys' New York, Time Museum, October 13th and 14th, 2004, lot 771

A German silver and brass analemmatic dial, English, late 18th century Has been cleaned, in good overall condition. The dial may have originally have had a plum line hanging from gnomon as there is a spare hanging hook The equinoctial ring dial- A new screw has been made for the altitude adjustment, a new steady pin has been made for the centre bracket and the dial has been cleaned. The complete description of the dial is below ,cataloguing for the second piece only, the meridian ring is engraved with a latitude scale 0-80º but divided to 90º reading to 1º. A pointer on the suspension piece may be set against a scale to adjust the instrument for latitude. Pivoted to the meridian ring is the equinoctial ring and engraved on one side and the inner face with an hour scale 1-12 x 2 reading to five minutes. The reverse of the equinoctial ring and the unused parts of the meridian ring are engraved with the latitudes of thirty seven places mainly in German and Central Europe. Within the hour ring is an usual bridge, this is a full circular thin plate with the center cut away except for an arched reinforcement strut. The plate is engraved on one edge with a zodiac scale, and on the other side, but on the same edge, a month scale is punched. The two together thus provide the requisite zodiacal calendar (0º Aries = 21 March). Pivoted diametrically opposite the center point of this scale is an alidade split to pass on either side of the plate. In use this alidade is set to the appropriate date, the dial is suspended in the meridian and the plate turned until a spot of sun light passes through each of the two pinnules in one vane of the alidade to fall exactly on the blank pinnules of the other. The time may then be read off from the position of the plate against the hour scale engraved on the equinoctial ring. The operation is an inconvenient one, and this central plate may be a later replacement of the bridge with sliding cursor which is more normal in this form of instrument. The mounts may also be later, if not they have been modified as one has two steady pins, the other only one. Beneath one or two steady pins is a now unused hole and the screws used appear to have machine cut threads.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. All dimensions in catalogue descriptions are approximate. Condition reports 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. Please note that we do not guarantee the authenticity of any individual component parts, such as wheels, hands, crowns, crystals, screws, bracelets and leather bands, since subsequent repairs and restoration work may have resulted in the replacement of original parts. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue. 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.NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

**Please be advised that bands 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.

Important Notice regarding importation into the United States of Rolex watches
Sotheby's cannot arrange for the delivery of Rolex watches to the United States because U.S. laws restricts the import of Rolex watches. The buyer or a designated agent may collect the property in the country of sale."

A new round of popularity was given to analemmatic dials in late 18th century England. James Ferguson included a description in his Lectures on Select Subjects (London, 1760 and fourteen later editions), underlining the chief advantage of the dial - that it is self-orienting.