Nautilus and modern Patek Philippe wristwatches

In one of the volumes of "Collecting Nautilus and modern Patek Philippe wristwatches" Gérald Genta talks about how difficult and expensive the Royal Oak and the Nautilus where to produce.

An interesting discovery is the original drawing of the Nautilus in profile clearly showing Mr Gentas intention of using 4 pins instead of 2. It is not a wild guess that Patek Philippe changed to a wider case with only 2 pins because of the greater difficulties of using 4 pins.

So it should have come as no surprise when experienced case manufacturers deemed the Arlanch by Gérald Genta watch impossible to manufacture because of the hidden angles of the case and the sharp corners of the glass. Committed to staying true to Mr Gentas design Arlanch instead turned to the Swedish jeweler Ba and their cutting-edge equipment for the production of the cases.

Please find attached an image from Ba how the Arlanch by Gérald Genta might look like and the original drawing of the Nautilus.