Seiko produces watches with quartz, kinetic, solar, and mechanical movements of varying prices. To separate the customer groups, Seiko has created many different brands in Japan and the international market including Lorus, Pulsar and Alba. On December 25, 1969, Seiko released the world’s first quartz watch, the Seiko Quartz ASTRON, which marked the beginning of the quartz revolution. The watch uses a crystal oscillator for accuracy, where the crystal generates steady vibration when voltage is applied to it. During the ten years of development at Suwa Seikosha, Seiko managed to create many parts which enabled the viable application of quartz in wristwatches.

Pada tanggal 25 Desember 1969, Seiko merilis jam tangan kuarsa pertama di dunia, Seiko Quartz ASTRON, yang menandai dimulainya revolusi kuarsa. Jam tangan ini menggunakan osilator kristal untuk akurasi, di mana kristal menghasilkan getaran yang stabil saat tegangan diberikan padanya. Selama sepuluh tahun pengembangan di Suwa Seikosha, Seiko berhasil menciptakan banyak bagian yang memungkinkan penerapan kuarsa yang layak di jam tangan.