Seiko considers the Seiko Marvel to be an epoch-making watch in its history, as it is the first Seiko watch whose movement was designed “fully in-house from scratch” — i.e., not influenced by other watch movements made in Switzerland or elsewhere. The movement diameter (26 mm) was larger than that of the Seiko Super (and matched the dimensions of the Seiko Automatic, which debuted the same year and is notable for being Japan’s first automatic wristwatch). It’s accuracy and stability, which incorporated a new Seiko invention, the “Diashock” shock absorption system, was far superior to that of its predecessors as well as that of other Japanese watches of that era. The Seiko Marvel was produced until 1959, when it was superseded by the Seiko Gyro Marvel, which had a new automatic movement with Seiko’s “Magic Lever” mechanism that increased the winding efficiency.
