Seiko “Sodalite” 3820-6000Model: Seiko Sodalite 3820 6000 38SQ Year: July 1973 Features: The Origin. In the 1970s Seiko released a special catalogue the Seiko Luxury Collection. Inside, you will find series of watches that ate subtlety for breakfast. Production was kept remarkably low, so even the most seasoned Seiko fans might struggle to recognise many of the pieces. But low production isnt the only reason these watches are seldom seen today. The Fate. When the 3820 6000 was