Seiko Cal. 5613 - 318

The Seiko 5613-318 represents an important milestone in Seiko's 1977 lineup. The Inner Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-b9e045ae7bfd]

Also known as: Monster, Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

44mm

Case Thickness

8.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Burgundy

Jewels

31j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1977

Related Models

• Seiko 4470-378
• Seiko 3812-947
• Seiko 7134-720
• Seiko 7018-898
• Seiko 4559-958
• Seiko 7056-704
• Seiko 6168-594
• Seiko 6339-663
• Seiko 6190-506
• Seiko 4494-237
• Seiko 6627-787
• Seiko 4474-345