Seiko Cal. 3841 - 637

The Seiko 3841-637 represents an important milestone in Seiko's 1997 lineup. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-67f01abdd16c]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Black

Jewels

32j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1997

Related Models

• Seiko 6154-916
• Seiko 6231-763
• Seiko 6148-513
• Seiko 7048-270
• Seiko 4586-461
• Seiko 5686-222
• Seiko 4496-567
• Seiko 7193-483
• Seiko 6175-106
• Seiko 4514-271
• Seiko 4480-262
• Seiko 7043-516