RM26-01 tourbillon caliber is equipped with a baseplate machined from black Onyx, a variety of chalcedony composed of silicon dioxide (SiO2) from the cryptocrystalline quartz group.
Onyx varieties featuring rectilinear black and white parallel str
RM26-01 tourbillon caliber is equipped with a baseplate machined from black Onyx, a variety of chalcedony composed of silicon dioxide (SiO2) from the cryptocrystalline quartz group.
Onyx varieties featuring rectilinear black and white parallel str
