UK auctioneers Bonhams presents their unique red Silverstone Calibre 11 Chronograph, designed as part of the 150th anniversary celebrations of TAG Heuer. It is set to be auctioned for charity on Wednesday 15th December, and is estimated to fetch between $9,000 to $12,000. The special edition chronograph is based on the newly launched Heuer Silverstone re-edition. The original Silverstone first appeared in the company’s 1974 catalogue and was worn by dominant 1970’s Swiss Formula One driver Clay Regazzoni. It is hugely popular amongst collectors and is the second most valuable series of Heuer watches after the Monaco. The Silverstone gets its name from the famous UK racetrack which has a special place in TAG Heuer’s heart, with many of its racing ambassadors and F1 team partners having scored career-making victories on it. The Silverstone’s distinctive and vintage design, a squared case with rounded edges in polished stainless steel, is one of Heuer’s purest designs and most emblematic creations. The TAG Heuer 2010 re-edition is faithful to the original — not just in the same conflation of round and square design aspects and the distinctive technical features, but with details such as the same vintage “Heuer” logo and “Silverstone” lettering at 12 o’clock, and a strap in top-grade perforated alligator.

Bonhams’ new chronograph has been designed with a red dial incorporating Jack Heuer’s signature and a “SILVERSTONE-UNIQUE PIECE 1/1 – CALIBRE 11 – 150th ANNIVERSARY 1860-2010 – SWISS MADE” exclusive engraving on the case back, making it a true one-off for the discerning collector. All proceeds from its sale will be donated to Green Cross International — an organization closely supported by TAG Heuer through their brand ambassador Leonardo di Caprio. The charity was founded in 1993 under the initiative of Mikhail Gorbachev to respond to the combined challenges of security, poverty and environmental degradation to ensure a sustainable and secure future for all. Sounds like as good a reason as any to throw down $10K on a unique one-off watch, no?

A large detail shot of the back of the watch after the Jump…