Sinn's 144 chronograph is a legendary watch line, and to help celebrate its 60th birthday, Sinn is releasing a new limited edition variant. The new watch provides plenty of nods to the original, including an all-black case. But the new Jubilaeum adds Black Hard Coating to the 41mm case, which in addition to Sinn's Tegiment scratch resistance technology makes this the toughest 144 to date. The watch is powered by Concepto C99001 automatic movement with chronograph functionality, and the dial features a tachymeter and pulsometer scale and a day/date window. Air de-humidifying tech is another modern feature, which claims to prevent fogging in high humidity. Limited to 600 examples, the timepiece arrives with both a minimalist black rubber strap and a Black Hard Coating H-link bracelet.