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Rare Seiko Grand Quartz 9943-8020

Seiko - 9943-8020 · $800

For sale is a rare Seiko Grand Quartz 9943-8020, one of the most collectible Twin Quartz GQ models with a hardened stainless steel case.

Case material: harden stainless steel
Edges retention: sharp

Posted at

Jan 29, 2026, 12:16 PM

Active

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Seiko Grand Quartz 9943-8020 // Unpolished and Serviced // Rare Black Dial

Seiko - 9943-8020 · $375

The Seiko Grand Quartz 9943-8020 is a rare black dial example from 1978 with a black alligator strap. It has a sharp case and a dark metallic gray dial that shimmers in the sunlight.

Condition: 8/10, unpolished and serviced
Case diameter: 36mm
Lug to lug length: 41.5mm
Lug width: 18mm

Posted at

Jun 10, 2025, 1:29 PM

Expired

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Seiko Grand Quartz 9943-8020

Seiko - 9943-8020 · $500

A beautiful example of vintage Seiko engineering, powered by the high-accuracy Twin Quartz Caliber 9943. The gold-toned case and refined dial layout make this watch a stunning piece from the late 1970s.

Condition: Unworn with minor marks
Accuracy: +/- 10 seconds per year
Case Size: 34mm diameter
Lug To Lug: 42mm

Posted at

Jun 7, 2025, 1:05 AM

Expired

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