Seiko Marvel

Designed by Suwa Seikosha. Introduced in 1956. Manual-winding movement. Available in stainless steel-cased, gold-plated, and gold-filled models. Movements not serial numbered. Some but not all stainless steel-cased models lack serial numbers on the case or on the movement.

The Seiko Marvel evolved into the Seiko Lord Marvel, which became Seiko's flagship watch at the time, before the introduction of the first Grand Seiko and the first King Seiko.

The Seiko Marvel movement was also the base for the Seiko Gyro Marvels calibre 290 movementl, which was Seiko's first in-house designed and manufactured automatic watch movement (and the second in-house designed and manufactured automatic watch in Japan, after Citizen's Auto), from 1959. This 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.