Seiko Cal. 6632 - 644

The Seiko 6632-644 represents an important milestone in Seiko's 1981 lineup. It features a White dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-9dd19cd0ce86]

Also known as: Sportsmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

White

Jewels

19j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1981

Related Models

• Seiko 6113-600
• Seiko 5634-315
• Seiko 4573-406
• Seiko 5285-599
• Seiko 4532-861
• Seiko 6688-502
• Seiko 6369-536
• Seiko 6195-785
• Seiko 0734-741
• Seiko 5638-861
• Seiko 7143-721
• Seiko 5235-416