At the 2011 Kidz Horizon Appeal charity ball on 27 August 2011, a unique Zeitwerk timepiece in white gold with a grey dial was auctioned for 138,000 Singapore dollars (approximately 80,000 euros), well above the retail price of a regular ZEITWERK. Proceeds from this auction went towards helping children suffering from chronic diseases such as cancer or AIDS.

The unique timepiece was created in memory of the late Mr Duncan Wang, an American Chinese businessman and philanthropist who passed away at the age of 44 years in August 2009. The patron of Kidz Horizon Appeal and passionate watch collector was a great admirer of A Lange n Sohne.

Formed in 2004, the relief organisation raises funds for children suffering from chronic diseases such as cancer or AIDS, whose parents are not in a position to afford the medical treatment they need. The highlight of the annual fund raising efforts is a charity ball that is held annually at the Ritz Carlton Singapore.

The first ever Lange watch to be produced for a charity in Asia, the design of this unique version, showcasing dark/bright contrasts, is emphasised by a white-gold case, grey dial and numeral discs with white numerals, a black alligator leather strap and the folding clasp, also crafted from solid white gold. A special engraving on its caseback bears witness to its uniqueness and the occasion

43 mm steel case, automatic movement with chronograph and UTC functions, fixed satin-finish bezel, anthracite dial, red gold-plated luminescent hands and red gold-plated numerals, black alligator-skin strap, pin buckle.

Note; earlier versions powered by 4810/503, which is the same movement under the older Montblanc reference system.