Seiko Cal. 6371 - 635

The Seiko 6371-635 represents an important milestone in Seiko's 1975 lineup. Powered by the 6371 caliber with 32j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-31d035eb8273]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Champagne

Jewels

32j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1975

Related Models

• Seiko 4435-310
• Seiko 4526-740
• Seiko 6375-738
• Seiko 6660-599
• Seiko 6135-634
• Seiko 6673-833
• Seiko 6621-499
• Seiko 3851-165
• Seiko 6293-364
• Seiko 7057-879
• Seiko 7084-880
• Seiko 4416-216