Richard MilleRM11-05 GMT in Black Ceramic on Blue Rubber Strap with Skeleton Dial

Richard Mille
RM 11-05
Automatic Flyback Chronograph GMT

As hard as a diamond, Cermet reappears on the scene in the exterior of the super rare
Richard Mille RM 11-05 Automatic Flyback Chronograph GMT,
as Richard Mille continues its ventures into the fascinating world of unobtanium-grade materials.
Essentially the 911-equivalent for the brand — and it continuously develops while maintaining its original, recognizable shape.
The RM 11-05 includes a GMT in the feature-packed caliber that has, for long, powered it.
But first, let’s briefly talk Cermet.

2,360 Vickers is the claimed hardness of “Grey Cermet.”
That’s what materials scientists tend to call “very hard.” To put that into perspective, the Grey Cermet in the RM 11-05 case is about six times harder than hardened stainless steel that generally clocks in at about 390 Vickers, and about 12 times harder than 18k gold at around 210 Vickers.
Developed together with the IMI Group (an England-based engineering company with a name like that of a Bond villain’s employer), Cermet owes its grey color to the combination of a metallic zirconium matrix with high-performance ceramic inserts.

Held together by 20 spline screws machined from grade 5 titanium, the case dimensions of the Richard Mille RM 11-05 Automatic Flyback Chronograph GMT watch in Cermet are 50.00mm lug-to-lug, 42.70mm in diameter and 16.15mm in total thickness.
Match that with the trademark arched caseback, flowing integration of straps, and the much rivaled but never matched feel of Richard Mille rubber straps, and you’ll have a super comfortable piece to wear.
I feel the time has come that the brand should consider providing the exact weight measurements of its watches so that prospective buyers can choose one model over the other based on this figure — as they do with their Superleggera automobiles.

The Richard Mille calibre RMAC3 still packs a punch: It’s a chronograph topped off with a flyback function, a GMT indication, and an annual calendar — probably one of the best-kept secrets among complications on any luxury watch.
Power reserve is 50 hours (+/- 10%), operating frequency is 28,800 vph, moment of inertia is 4.8 mg•cm2 and the angle of lift is 53°.
The barrel arbor is in AP20 steel.