Side View of Head Skull in Sagittal Section, with Cranial Nerves, 1489 
Pen and brown ink, 190 x 137 mm 
Windsor Castle, Royal Library 
(RL 19508r)

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258 Anatomical Study of Head Skull in Sagittal Section, Seen From The Front, 1489 
Pen and brown ink over traces of black chalk, 183 x 130 mm 
Windsor Castle, Royal Library 
(RL 19058v)

622 Notes on Optimum Flying Altitude and on Wing Construction, 1505 
Pen and ink, 213 x 154 mm 
Turin, Biblioteca Reale, Treatise on the Flight of Birds, fol. 6v

621 Notes on Safe Flying Altitude and on Wing Construction, 1505 
Pen and ink, 213 x 154 mm 
Turin, Biblioteca Reale, Treatise on the Flight of Birds, fol. 7r

607 Study of the Wing of a Flying Machine, c. 1500-1505 
Red chalk, 180 x 250 mm 
Milan, Biblioteca Ambrosiana, Codex Atlanticus, fol. 70b-r/22v-b

Can I return or exchange my purchase? We will gladly accept the return of unused or undamaged (excluding special orders) merchandise for a full refund (less shipping), subject to the following limitation: For a full refund, merchandise must be returned within 45 days of receipt, unused and in original condition. View Details.

606 Study of a Wing Mechanism, cd. 1290-1495 
Pen and ink, 369 x 272-289 mm 
Milan, Biblioteca Ambrosiana, Codex Atlanticus, fol. 854v/311vd

How do I place an order online? Orders can be placed on our website using our secure online ordering form and shopping carts. Orders above $2500 require fax and voice confirmation. Within 24 hours you will receive an e-mail confirmation of your order. You can also order by calling us at 800-871-1066. View Details.

605 Study of Articulated Wings, c. 1490-1493 
Pen and ink, 290 x 218 mm 
Milan, Biblioteca Ambrosiana, Codex Atlanticus, fol. 844rv/308r-a

Will you charge sales tax on my order? To be clear, the Internet Tax Freedom Act (ITFA), which was signed into law on October 21, 1998, does not, as some have asserted, preclude sales & use taxes on any and all commerce conducted over the Internet. We charge 5.75% sales tax for Ohio State residents. View Details.

Drapery Study for a Seated Figure Seen in Three-quarter Profile to the Left, 
c. 1475/76 
Brush and grey tempera, with white heightening, on grey canvas 
220x139 mm 
Paris, Musse de Louvre 
Cabinet des Dessins, R.F. 41905

181 Drapery Study for a Kneeling Figure turned to the left, 
c. 1475-1480 
Metalpoint, charcoal and brown wash, with white heightening on vermilion prepared paper 
257-190 mm 
Rome, Gabinetto delle Stampe, 
Inv. F.C. 125770

180 Leonardo (or Andrea del Verrocchio/) 
Drapery Study for a Standing Figure Seen from the Front?, 1478-1480 
Brush and greyish-brown tempera, with white heightening, on grey canvas 
315x203 mm 
Rennes, Musse de beaux-Arts 
Inv. 794-1-2507

604 Take-off and Landing Gear for a Flying Machine, 1487-90 
Pen and ink, 232 x 165 mm 
Paris, Bibliotheque de l’Institut de France, MS B 2173, fol 89r

How do I know what shipping charges are? We offer several shipping options: FedEx Ground $5.00; FedEx 2 Day (U.S. Addresses Only) $8.00; FedEx Overnight (Standard Overnight Delivery) $15.00. Customers living in the U.S.: using two day shipping should receive their orders in 2-4 business days and overnight shipping should receive their orders in 1 to 2 business days. View Details.

603 Testing the Load Tolerance of a wing, 1487-90 
Pen and ink, 232 x 165 mm 
Paris, Bibliotheque de l’Institut de France, MS B, fol 88v

We accept Visa, MasterCard, American Express and Discover for all orders placed through Sndgems.com. You will be prompted to give us information about your method of payment at the appropriate point in the checkout process. For deliveries within the State of Ohio, there is a 5.75% sales tax added to your order. We do not charge sales tax for out of Ohio State residents. View Details.

602 Bird’s-winged Apparatus with Partly Rigid Wings, c. 1488-90 
Pen and ink and red chalk 
289 x 205 mm 
Milan, Biblioteca Ambrosiana, Codex Atlanticus, fol. 846v/309v-a

What is your repair or replacement policy? We will repair or replace jewelry purchased from us free of charge for defect or faulty workmanship. At sndgems.com, we stand behind every jewelry we sell. Our jewelry service center has highly skilled professionals to provide you prompt service. Check your jewelry like rings every six months as the prongs can wear thin. View Details.

202 Bust of an Older Man in Profile (Gian Giacomo Trivulzio), c. 1510 
Red and black chalk on reddish prepared paper, 222 x 159 mm 
Windsor Castle, Royal Library 
(RL 12556r)

203 Head and Shoulders of a Youth in Profile (Salai?) 
c. 1510 
Black chalk, 193 x 149 mm 
Windsor Castle, Royal Library 
(RL 12557)

206 Head and Shoulders of a Bearded Man in a Turban, 
c. 1510 
Pen and ink, 154 x 205 mm 
Windsor Castle, Royal Library 
(RL 19106r)

Side View of Head Skull in Sagittal Section, with Cranial Nerves, 1489 
Pen and brown ink, 190 x 137 mm 
Windsor Castle, Royal Library 
(RL 19508r)

Store Location: Sparkle N Dazzle Co., 7W 45th Street #707, New York, NY 100366 (between 5th & 6th Avenues). Voice: (800) 871-1066 or (212) 398-7974 Fax: (800) 610-6770 E-mail: inquiry@sndgems.com.

258 Anatomical Study of Head Skull in Sagittal Section, Seen From The Front, 1489 
Pen and brown ink over traces of black chalk, 183 x 130 mm 
Windsor Castle, Royal Library 
(RL 19058v)

Sparkle N Dazzle guarantees that the diamond you purchased has been graded with the strictest standards using the GIA grading systems. The sapphires will display rich blue in color. 100% Authentic Designer Clothes & Discount Designer Handbags. View Details.

216 Study of a Grotesque Couple, c. 1489/90 
Pen and ink, 262 x 123 mm 
Windsor Castle, Royal Library 
(RL 12449r)

Sparkle N Dazzle is a member of the Jewelers Board of Trade, which is an organization committed to holding jewelers to the highest ethical and professional standards in the jewelry & fashion industry. View Details.

Frequently Asked Q's

215 Grotesque Head of an Old Man with a Hat, seen in Profile, c. 1490 
Pen and ink and black and red chalk, 159 x 93 mm 
Windsor Castle, Royal Library 
(RL 12448r)

Sndgems.com Online Jewelry Store offers Authentic Jewelry with Genuine Gemstones, Certified Diamonds and Real Metals. Read More. We have developed our frequently asked question's page based upon your queries and feedback developed over a number of years. Help yourself by searching our database. View Details.

214 Character Head of an Old Man, c. 1505 
Red chalk, 94 x 60 mm 
Paris, Musee des Dessins, 
R.F. 2249

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Live Person: You can chat with us live now - an online chat with one of our customer service experts. Our customer service experts are usually available from 10.00 am to 10.30 pm eastern std time. View Details.

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Engraving can be done in regular as well as script fonts and can be all uppercase or all lowercase. View Details.

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