Seiko Cal. 6686 - 878

The Seiko 6686-878 represents an important milestone in Seiko's 1970 lineup. It features a Navy dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-2085d66d9ca9]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Titanium

Case Width

38mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1970

Related Models

• Seiko 6644-695
• Seiko 5647-440
• Seiko 6332-969
• Seiko 4534-615
• Seiko 4499-702
• Seiko 6299-952
• Seiko 7192-611
• Seiko 6374-615
• Seiko 4423-373
• Seiko 6157-321
• Seiko 5672-575
• Seiko 7117-925