Continuing its annual tradition, Patek Philippe has just revealed its unique creation to benefit Children Action, the Nautilus Ref. 5711/1500A. Slated to be sold at auction with all proceeds going to the Geneva charity, the Nautilus Ref. 5711/1500A is entirely stainless steel and entirely engraved.

The engraved Nautilus is the latest one-off wristwatch Patek Philippe has created for the Geneva charity. Past watches include the Calatrava Pilot Travel Time ref. 5524T in titanium and last year’s ref. 5270T in titanium with a green dial that sold for almost CHF10 million.

The case, bezel, bracelet, and case back are hand engraved with a “Maori-inspired” motif that’s matched with a dark grey dial. While aftermarket engraving has been applied to various Nautilus models in the past, this is the first factory-original specimen decorated in this manner.

Patek Philippe’s catalogue does include several complicated models decorated with engraving, most famously the Sky Moon Tourbillon ref. 6002, but they all complicated and in precious metal. This is the first and only Nautilus (or sports watch of any sort) with an engraved case, and also the only steel model with engraving.

The watch is accompanied by a pair of matching cufflinks in engraved steel, which are equally unique as Patek Philippe ordinarily only sells gold cufflinks.

The matching cufflinks ref. 205.9057A-010

The Nautilus Ref. 5711/1500A will be sold at the Children Action gala dinner in Geneva on November 25 with Aurel Bacs of Phillips conducting the auction. All of the proceeds from the watch, which will inevitably be several million francs, will go to Children Action. For more, visit Childrenaction.org.