Patek Philippe 5212A Calatrava Weekly Calendar in stainless steel and silvery Opaline dial and blackened gold applied hour markers. This new complication from Patek Philippe in a unique case features a stainless steel vintage style case with two-tiered lugs. Functions include a date aperture at 3 o’clock, an inner day chapter ring, and an outer week number chapter ring featuring black painted text inspired by vintage handwritten dials, and a central sweep seconds hand. Fitted on a vintage-style hand-stitched brown leather strap with a matching stainless-steel prong buckle. It has a scratch-resistant sapphire crystal and a sapphire crystal exhibition case back. There are two correctors on the left-side case band at 8 and 10 o’clock for the weekly calendar function. 40mm

It has an exhibition sapphire display crystal case back and the 40mm diameter round solid two-body case, fluted curved lugs, and stepped flat angled bezel, are polished. The silver opaline dial has blackened gold dauphine sword hour and minute hands, applied blackened gold "boat-shaped" hour markers around a black pip minute/second scale, and a center sweep second hand. It has a center sweep minute/second hand, and there is an inner black day-scale with completely spelled vintage font days with a steel hand with a red crescent indicator. It includes a date aperture window at 3 o’clock, outer 52-week Arabic numeral scale and a perimeter month chapter ring. It has a 45-hour power reserve, it’s water resistant to 30 meters/100 feet, and the 11mm thick case, dial, and movement are all signed.

This Patek Philippe Calatrava Weekly Calendar 5212A-001 has a mechanical automatic Patek Philippe caliber 26-330 S C J SE movement. It’s rhodium plated with Cotes de Geneve embellishment on the bridges, it has the Patek Philippe seal, and it’s constructed with 50 jewels, 304 components, an anti-shock system, and a central 21k gold rotor with a Calatrava symbol. It includes a monometallic Gyromax balance, a Spiromax self-compensating flat balance spring, and the mechanism oscillates at a frequency of 28,800 vph (4Hz).