Seiko Crown Diashock 21 Jewels – frühe 1960er – Tropical Dial – technischer Urahn der Grand Seiko Quarz The so-called “second setting” mechanism

The so-called “second setting” mechanism was not a gimmick

– Bidirectional winding

manual winding capability and a power reserve of approx

watchmakers and restorers who want to authentically restore a Citizen Vega "Junction" caliber 4A30

Seiko Crown Diashock 21 Jewels – frühe 1960er – Tropical Dial – technischer Urahn der Grand Seiko Quarz The so-called “second setting” mechanismA significant piece of early Japanese watchmaking: a Seiko Crown "Diashock 21 Jewels" from the early 1960s with a beautifully aged, genuine Tropical Dial and historically, the direct predecessor to the first Grand Seiko. The Crown Foundation of the Grand Seiko: Introduced in 1959 by Suwa Seikosha as an elegant, high end dress watch, the Crown built upon the Marvel but brought significant advancements with the Caliber 560: a larger balance for better