Seiko Gyro Marvel

The Gyro-Marvel was Seiko's first in-house designed and manufactured automatic watch (and the second in-house designed and manufactured automatic watch in Japan, after Citizen's Auto), from 1959, which used calibre 290, which was based on the Marvel hand-winding mechanical movement. The Gyro Marvel's calibre 290 was the first movement to use Seiko's simple Magic Lever pawl lever automatic winding design, which forms a module which can be bolted on top of an originally manual-winding mechanical movement design, rather than the more complicated Swiss-style reverser wheels automatic winding design. It was preceded by Seiko's first Automatic, from 1955, which used calibre 11A, a Swiss-designed AS 1382 movement which was licensed and manufactured by Seiko in Japan.