The Portugieser Sidérale Scafusia is one of the most complicated watches in the world of Haute Horlogerie from IWC Schaffhausen. Ten years of research and development were required to produce this impressive masterpiece. A complex team of watchmakers and specialists that include watchmakers such as Jean-François Mojon, Stefan Ihnen, Mario Klein, and Stefan Brass was required to complete this masterpiece of horology.