The watch is sold with 2 rings of massive stainless steel (3 colors available : black, gold, steel).
Model:
MV40 MM steel

Materials:
ETA Swiss quartz, sapphire crystal, steel

Dimensions:
Diameter: 40 mm
Thickness: 6.5 mm
Weight: 76 g
Battery Ref: 364

Designer:
Lella and Massimo Vignelli