Citizen AO9020-17H is an amazing and special Gents watch.
Material of the case is Stainless Steel
Light-powered Eco-Drive watch featuring matte gray dial with day and date subdials 
42 mm silver-tone case with mineral dial window 
Japanese quartz movement with analog display 
Leather calfskin band with buckle closure 
This watch is market as water resistant. It means it can withstand slight splashes and rain, but is NOT to be immersed in water.