Seiko Cal. 3870 - 351

Released in 1971, the Cal. 3870 with design code 351 was part of Seiko's domestic market collection. The Fixed bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-4380c0df7fe9]

Also known as: Tuna, Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Navy

Jewels

24j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1971

Related Models

• Seiko 6229-434
• Seiko 5663-634
• Seiko 6316-693
• Seiko 6657-932
• Seiko 3852-624
• Seiko 0743-321
• Seiko 0763-545
• Seiko 4547-803
• Seiko 4553-925
• Seiko 7160-282
• Seiko 0745-857
• Seiko 6290-643