Limited Pioneer Edition, piece no. 11/24. Worn only on special occassions. Advanced design in the new tri-titanium case An unusual watch concept deserves an unusual case. New tri-titanium case convincingly showcases this claim. It is made of three special titanium alloys that are otherwise used in the high-tech industry and medical technology. Each of the three zones has a specific composition that, when combined, ensures optimal wearing properties and absolute freedom from allergies. The new fully screwed tri-titanium case from BOTTA combines a sophisticated case architecture with excellent technical properties.