The Bulgari Diagono Professional Chronograph (Ref. CH40STA) is a contemporary sports watch characterized by its robust 40mm stainless steel case and high-contrast "Reverse Panda" dial. Part of the "Pro Terra" or "Tachymetric" line, this model blends Bulgari’s architectural design with functional racing aesthetics.

• Case & Bezel: A 40mm brushed stainless steel case featuring the signature fixed steel bezel with an engraved tachymetric scale.

• Dial Appearance: The "Reverse Panda" dial features a matte black base with contrasting silver or white sub-dials (chronograph registers). It includes applied baton hour markers, a luminous Arabic numeral at 12, and a date window positioned between 4 and 5 o'clock.

• Movement: Powered by a COSC-certified automatic chronometer movement (typically the Caliber B080 or ETA 2894 based), offering reliable self-winding performance.

• Glass: Scratch-resistant sapphire crystal.

• Water Resistance: Rated for 10 ATM (100 meters), making it suitable for swimming but not professional diving.