Seiko Cal. 6370 - 139

The Seiko 6370-139 represents an important milestone in Seiko's 1975 lineup. Powered by the 6370 caliber with 27j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-dc68c2a58c69]

Also known as: Helmet, Rally

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

13.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1975

Related Models

• Seiko 5284-487
• Seiko 5297-724
• Seiko 6365-498
• Seiko 6627-777
• Seiko 6638-315
• Seiko 5644-302
• Seiko 6167-792
• Seiko 7043-987
• Seiko 7058-434
• Seiko 7022-995
• Seiko 7027-737
• Seiko 4542-138