This Oris Leonard Euler Sudoku Limited Edition (ref 733.7600.40.84.LS) was issues to commemorate the three hundredth anniversary of the birth of the great Swiss mathematician, Leonhard Euler, said the be the father of the popular number game Sudoku. It is in a 42mm (includung the lugs) x 36mm x 11mm rectangular SS case with the case back secured by four fine screws, water resistant to 50 meters. An image of Leonard Euler is inscribed on the case back. It has a black dial with a Sudoku game board in the background and quickset date at six. It has a sapphire crystal and a signed non-screw down crown. This watch is on a signed black leather strap with tang type buckle. It is new and unworn, without a single scratch or other imperfection on the case or crystal. The Oris cal 733 (base cal SW 200) 26 jewel automatic movement maintains accurate time within a tolerance of seven three seconds pr day. This unworn limited edition Swiss watch is one of only 1707 distributed worldwide to honor Euler's year of birth, 1707. It will be sold boxes, hang tag, a special set including Sudoku game box, papers, and a one year Watchseller Warranty, and it has a list price (MSRP) of $1575. ORS360 $720.00 Click to See Larger Image Click to See Larger Image Please feel free to contact us by phone or email if you have questions or wish to order any watch. Click on Policies and FAQ for details about watch purchases and our three day return policy. Ed and David Loebl THE WATCHSELLER, LLC 6890 East Sunrise Drive #120-143 Tucson, AZ 85750-0739 520-615-8800 deloebl@comcast.net THE WATCHSELLER, LLC is the US distributor for Epos watches and is an authorized dealer for Aristo, Atlantic, RGM, and Vollmer watches. We are not an authorized dealer for any of the other brands of watches that we offer for sale. All watches sold by The Watchseller are genuine and authentic.