Seiko Cal. 3870 - 104

The Seiko 3870-104 represents an important milestone in Seiko's 1998 lineup. The Coin-Edge bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-32bab9b4d832]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Navy

Jewels

32j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1998

Related Models

• Seiko 5218-918
• Seiko 5677-284
• Seiko 6118-526
• Seiko 7177-878
• Seiko 7087-689
• Seiko 5263-626
• Seiko 7146-124
• Seiko 6160-810
• Seiko 5690-957
• Seiko 6645-479
• Seiko 5241-635
• Seiko 0773-888