Seiko Cal. 6378 - 663

This Spring Drive model from 1989 features a 34mm Two-Tone case. The Fixed bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-4126d7040482]

Also known as: Sumo, Panda

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

32j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1989

Related Models

• Seiko 4581-393
• Seiko 6154-898
• Seiko 6317-389
• Seiko 4499-371
• Seiko 5684-675
• Seiko 4588-278
• Seiko 7080-667
• Seiko 3837-504
• Seiko 0769-838
• Seiko 7183-584
• Seiko 7150-224
• Seiko 0789-739