🔹 Overview
The O Speedmaster Moonphase Chronograph Ref. 304.30.44.52.01.001 unites cosmic beauty with advanced chronometry. Inspired by the legendary Moonwatch, this 44.25 mm model enhances the story with a photo-realistic moonphase display at 6 o’clock — a tribute to NASA’s lunar photography. With its black sun-brushed dial, dual domed subdials, and Liquidmetal™ tachymeter bezel, this Speedmaster is a bold expression of heritage and innovation.

💎 Key Specifications
Reference: 304.30.44.52.01.001
Case: 44.25 mm stainless steel, brushed and polished
Bezel: Black ceramic with Liquidmetal™ tachymeter scale
Dial: Black sun-brushed with dual domed subdials, moonphase and date indicator at 6 o’clock
Crystal: Domed scratch-resistant sapphire with anti-reflective treatment
Bracelet: Polished-brushed stainless steel bracelet with folding clasp
Functions: Central hours, minutes, chronograph seconds; 60-minute and 12-hour totalizer; moonphase; date with crescent-tipped hand
Water Resistance: 100 m / 330 ft

⏱️ Movement
Type: Perpetual, mechanical, self-winding
Caliber: O Co-Axial Master Chronometer Calibre 9904
Certification: METAS Master Chronometer, resistant to magnetic fields up to 15,000 gauss
Features: Column wheel, vertical clutch, twin-barrel system for stability; chronograph; moonphase accurate for 122 years with correct setting
Power Reserve: ~60 hours
Finishing: Geneva waves in arabesque, rhodium-plated rotor and bridges, visible through sapphire caseback

✅ Conclusion
The O Speedmaster Moonphase Chronograph Ref. 304.30.44.52.01.001 is more than a chronograph — it is poetry in motion. Its detailed lunar display, robust calibre 9904, and iconic Speedmaster design make it a rare balance of art and precision. Whether for dreamers, explorers, or collectors, it embodies the eternal connection between timekeeping and the cosmos, bringing the Moon closer with every glance.