Original Seiko spare part 351902 (351-902) from unused old stock (NOS). This is the winding stem for the Seiko 9011 mechanical stopwatch. This component is central to the winding and correct operation of the movement. The part comes from long-term storage (“deadstock”), is unused and is in excellent original condition – particularly valuable as spare parts for the 9011 stopwatch are rarely available on the market anymore.
