Seiko Cal. 6637 - 407

The Seiko 6637-407 represents an important milestone in Seiko's 1971 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 110m of water resistance. [seikata-wm-4e7762edb94a]

Also known as: Samurai, Sea Horse

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1971

Related Models

• Seiko 5263-754
• Seiko 4521-623
• Seiko 6133-472
• Seiko 5220-632
• Seiko 6237-770
• Seiko 6329-365
• Seiko 4528-468
• Seiko 5665-434
• Seiko 6182-586
• Seiko 7172-558
• Seiko 5618-780
• Seiko 6261-966