155

The Sinn 155 draws its appeal from its roots in German military chronographs, directly inspired by the “Bund” watches supplied to the Bundeswehr in the 1960s and 70s. This heritage makes it especially attractive to those seeking a modern reissue with authentic vintage cues, including the distinctive bicompax dial and prominent pushers. Unlike most Sinn tool watches, the 155 is produced in limited numbers, and its periodic re-releases tend to sell out quickly, further fueling collector demand.

Key references like the 155 Bundeswehr and special editions such as the 155 Black differ mainly in case finishing, dial details, and lume color. Earlier models used the hand-wound Valjoux 230, but reissues typically house automatic movements like the SW 510, providing reliable chronograph performance and a quickset date. The 43mm bead-blasted case and 100m water resistance make it wearable in daily life, though the substantial size is truest to the original military spec.

Price variation is driven by movement type, edition size, and originality—vintage examples with the original Valjoux caliber command a premium, while modern reissues offer better availability and lower servicing costs. Confirm whether a watch is an original Bundeswehr issue or a Sinn reissue, as this distinction has a major impact on value. Box and papers are a plus for recent models, but not essential for earlier military-issued pieces, where provenance and condition matter most.