Seiko Cal. 6639 - 858

Released in 1987, the Cal. 6639 with design code 858 was part of Seiko's domestic market collection. With its 18mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-08ffe722ac44]

Also known as: Sumo, Bullhead

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

9.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Burgundy

Jewels

35j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1987

Related Models

• Seiko 0711-473
• Seiko 5221-662
• Seiko 7085-498
• Seiko 5625-746
• Seiko 6635-688
• Seiko 4575-167
• Seiko 7067-137
• Seiko 0753-691
• Seiko 6298-424
• Seiko 6354-511
• Seiko 6118-810
• Seiko 6179-160