Original Seiko crown 30R10NS1 (also listed as 98430R10NS1 , alternative reference 8100-1880W ) from unused old stock (NOS). This crown is compatible with the Seiko model 6030-5210 and exactly matches the manufacturer's original specifications. It ensures the correct operation of the winding mechanism and hand setting and, due to the model series, is rarely available as an original part.
The crown is unused, well preserved and ideally suited for the professional restoration or overhaul of vintage Seiko watches.
