Seiko Cal. 5631 - 170

This Automatic model from 1978 features a 38mm Titanium case. It features a Silver dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-c74c98790d60]

Also known as: Turtle

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

38mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1978

Related Models

• Seiko 4546-791
• Seiko 6238-736
• Seiko 7140-909
• Seiko 6182-468
• Seiko 4582-793
• Seiko 7065-709
• Seiko 7084-942
• Seiko 6364-376
• Seiko 4556-141
• Seiko 7133-690
• Seiko 5296-861
• Seiko 5214-635