The Patina and Plexi Seiko Suwa vs Daini Protocol: The 2026 Brand History Guide
The Patina and Plexi Seiko Suwa vs Daini Protocol: The 2026 Brand History Guide The foundation of modern vintage Seiko collecting rests upon the intense, internal corporate rivalry between two manufacturing facilities: Suwa Seikosha and Daini Seikosha. Operating independently throughout the 1960s and 1970s, this competition drove the rapid advancement of Japanese horology, birthing the…