Original Seiko spare part 354544 from unused old stock (NOS). This is a winding stem for mechanical Seiko watches. The part is from long-term storage ("deadstock"), is unused and in excellent original condition.
The winding stem is a central component of the key movement and is necessary for winding and setting the hands. Due to the limited availability of original vintage Seiko parts, this spare part is particularly relevant for watchmakers and collectors.
