The Atlas case is made of 316L stainless steel with a screw-down crown and sapphire caseback with engravings. The mid-case features brushed sides with polished bevels on the inner and outer lugs. The bezel has a brushed, radial/sunburst finish. The Atlas uses the MONTA Caliber M-23 self-winding, mechanical movement with bidirectional rotor. It is manufactured, assembled, and tested in Switzerland.