The Richard Mille RM 67-01 Extra Flat is one of the brand’s most refined and wearable timepieces, engineered to combine ultra-thin watchmaking with the signature tonneau case. Introduced in 2016, it represents a shift toward a more discreet, lifestyle-oriented Richard Mille, without sacrificing technical complexity.

Key Features

• Case & Construction
• Material options: Grade 5 titanium, Carbon TPT®, gold variants
• Dimensions: ~38.7 × 47.5 mm
• Thickness: ~7.75 mm (exceptionally thin for RM)
• Water resistance: ~50 m
• Crystal: Sapphire front and caseback

The RM 67-01 is one of the thinnest tonneau-shaped watches ever produced by Richard Mille, designed for maximum comfort and everyday usability.

Dial & Design

• Dial: Fully skeletonized (openworked)
• Numerals: Solid metal, mounted on titanium rails (floating effect)

Display

• Hours & minutes
• Date at ~5 o’clock (vertical window)
• Function indicator at ~2 o’clock

The design emphasizes depth and transparency, with a multi-layered architecture that draws the eye toward the movement.

Movement

• Caliber: CRMA6 (in-house)
• Type: Automatic, ultra-thin skeletonized
• Thickness: ~3.6 mm
• Power reserve: ~50 hours
• Frequency: 28,800 vph

Technical Highlights

• Platinum micro-rotor with efficient winding system
• Free-sprung balance with variable inertia (improved precision)
• Grade 5 titanium baseplate & bridges (rigidity + shock resistance)

This movement balances extreme thinness with durability, a key challenge in high-end watchmaking.

Function Indicator System

• Located near 2 o’clock

Displays

• W (Winding)
• D (Date setting)
• H (Hand setting)

Acts like a gearbox indicator, showing the crown’s current function—rare in ultra-thin watches.

Strap & Wearability

• Strap: Rubber (sport-focused)
• Clasp: Titanium deployant
• Extremely lightweight and ergonomic, designed for daily wear