Seiko Cal. 6637 - 836

Released in 1982, the Cal. 6637 with design code 836 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-a97e6fe39eb1]

Also known as: Navigator, Emperor

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

130m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1982

Related Models

• Seiko 5232-855
• Seiko 6135-209
• Seiko 6669-355
• Seiko 5654-707
• Seiko 7067-234
• Seiko 4437-606
• Seiko 4478-688
• Seiko 3895-241
• Seiko 5655-244
• Seiko 7142-441
• Seiko 6282-949
• Seiko 7178-185