Seiko Cal. 6645 - 547

This Spring Drive model from 1981 features a 37mm Titanium case. It features a Burgundy dial protected by a Mineral crystal and offers 110m of water resistance. [seikata-wm-0ba201cc0c8d]

Also known as: Sumo, Silverwave

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1981

Related Models

• Seiko 5657-839
• Seiko 6320-724
• Seiko 6272-860
• Seiko 7166-454
• Seiko 3850-484
• Seiko 7047-164
• Seiko 6332-460
• Seiko 0782-210
• Seiko 6333-325
• Seiko 3888-313
• Seiko 5654-776
• Seiko 4591-768