SevenFriday Watch S2/01 Brassy S2/01. Like the ubiquitous valve that patinas with good use, the S2/01 is a study of the hard working machines that helped define the second industrial revolution. The rhodium and antique brass open design detail surrounded by an antique brass animation ring of the S2/01 shows the deep appreciation for the valve as the workhorse of the industrial revolution. The S2/01 is a noteworthy timepiece that exemplifies for the individual, the pride and progression of its industrial revolution influences