The Sinn 556 is the German manufacturer's bare-bones pilot's watch model. It's the most affordable in all of Sinn's lineup, coming in at $1,530 on a bracelet. And for that money it's more about what you don't get – there are no bells and whistles here; its charm lies in its absolute simplicity. The "base" model 556 comes in two dial executions: The 556i has baton markers and a dial devoid of any numerals, whereas the 556a has stylized Arabic numerals at three, six, 12, and nine.