Seiko Seikomatic 6218-8970 Weekdater AD Silver Sunburst Dial

Introduced in the mid-1960s, the Seiko Weekdater reflects the clean, modern aesthetic of mid-century Japanese design. Released in 1964, the 6218-8970 was part of the Seikomatic line and served as an automatic counterpart to the hand-wound Grand Seiko models of that era. Built on the 62-series movement, it would later become the foundation for Seiko’s first self-winding Grand Seiko.

This early Weekdater model features a split day-date window with a full day display—a distinctive design that adds character to the dial. The silver sunburst applied dial (AD) is adorned with both the Seiko and Seikomatic logos, with the latter printed in the classic cursive font. It also features polished dauphine hands, baton hour markers, and a raised minute track, all housed in a bold 37mm round case with thick lugs and mirror-polished finished, generously sized for its time.

Powering the watch is the 35-jewel Seiko Caliber 6218, running at 18,000 bph. It includes hacking seconds, a quickset date, and a semi-quickset day function, marking it as one of Seiko’s most advanced movements of the 1960s.

This example has been recently serviced and is running good with all functions working well. The unpolished case shows minor wear, of hairline scratches with fading on the caseback markings that are still visible under angled light. The dial is clean overall, with a small spot near the 11 o’clock marker, while the logos and text remain sharp. The original domed crystal is still intact, with light signs of age—a small nick and an internal hairline crack that doesn’t affect legibility or performance.

The 6218-8970 is a highly collectible piece from Seiko’s upper mid-range lineup of the time, offering a wonderful balance of historical significance, mechanical quality, and timeless design.

Brand type : Seiko Seikomatic
Dial : Silver sunburst dial
Circa : 1964
Movement : 6218
Strap : AM
Back case : Original
Crown : Original
Diameter : 37 x 44 mm lug to lug
Lug width : 19mm
Condition : used, good condition, few signs of wear, refer to pictures shown.
Features : weekdater, quickset date
WR : Not tested
Includings : Watch only with replacement box

Note:
The item price does not include import duties and taxes.
The watch is tested and recorded before shipment to ensure it is working normally.
The watch is insured for every shipment.
The watch will be shipped in a pillow hard case watch container and craft paper box, covered with multiple bubble warp layers to ensure safety.
IG: goh.vintagewatch