Sinn fans rejoice; the Frankfurt favorite has finally released a watch we?ve all been waiting for. 156 is a number that most Sinn fans have memorized as it refers to one of the most excellent watches in the Sinn archives, not just because of its looks but also because of its lineage and movement(s). You see, the story of the 156 begins with a watch by a different brand altogether, the Heuer-Leonidas Bundeswehr 1550 SG, commonly called the ?Heuer Bund.?

image credit: analogshift.com

A pilot?s chronograph used in the 60s and 70s mainly by the German airforce, though others as well, the Bund was a remarkable tool watch of its day. Powered by the manual wound Valjoux 22 and Valjoux 230 calibers, they featured flyback mechanisms and a clean, bold design with large lumed numerals and a particularly appealing bezel layout. Measuring 43mm in diameter and 13mm thick, they were huge for the era, though in keeping with pilot watch tradition. Helmut Sinn, the founder of Sinn, purchased old inventory of these watches in the 1980s, reconditioned them, added Sinn branding, and rebadged them as the Sinn 155 Bw. In the late 1980s, Helmut set out to create a new generation of military-issued pilot?s chronographs with the 156 by combining the case and general dial design of the 155/Bund with relatively new-to-the-market automatic chronograph movements by Lemania. Thus, the 156 is the direct successor to the Bund via the 155.

My Sinn 156 – gone, but not forgotten

The 156s mo...