Seiko Cal. 5644 - 137

The Seiko 5644-137 represents an important milestone in Seiko's 1988 lineup. It features a Green dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-6023451a908d]

Also known as: Sportsmatic, Crown

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1988

Related Models

• Seiko 4538-781
• Seiko 4551-292
• Seiko 4463-594
• Seiko 6272-794
• Seiko 6188-717
• Seiko 7185-958
• Seiko 7076-428
• Seiko 6160-978
• Seiko 3812-277
• Seiko 7185-381
• Seiko 5669-439
• Seiko 0764-879