Seiko Cal. 6647 - 337

The Seiko 6647-337 represents an important milestone in Seiko's 1983 lineup. It features a Black dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-7bb06eaf9fe8]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Black

Jewels

32j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1983

Related Models

• Seiko 5631-740
• Seiko 7137-155
• Seiko 7163-220
• Seiko 5212-763
• Seiko 7122-688
• Seiko 6228-475
• Seiko 4483-977
• Seiko 5649-193
• Seiko 6388-129
• Seiko 4588-857
• Seiko 7177-733
• Seiko 4526-809