VINTAGE SEIKO SilverWave Z WORKING,Vintage 1978 SEIKO ACTUS SilverWave 6306-8010 RARE JDM Blue Auto Watch Serviced,Seiko Silverwave Automatic 6306-8000 day date / case no.6N5331 , made in Japan .,Seiko Silverwave Automatic 6306-8000 day date / case no.6N5331 , made in Japan .,Vintage SEIKO QUARTZ SILVERWAVE 7121-7030 FOR PARTS OR REPAIR WATCH JAPAN