Seiko Cal. 5644 - 540

This Automatic model from 1989 features a 41mm Stainless Steel case. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-8de157d3fc55]

Also known as: Crown, Baby Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1989

Related Models

• Seiko 0782-875
• Seiko 4436-946
• Seiko 4418-671
• Seiko 4413-306
• Seiko 0779-733
• Seiko 3812-699
• Seiko 6398-572
• Seiko 5265-479
• Seiko 0749-325
• Seiko 6612-528
• Seiko 5264-540
• Seiko 6320-814