Seiko Cal. 3847 - 685

The 3847-685 is a sought-after Spring Drive piece from Seiko's golden era. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-071ab37fe71d]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

21j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1975

Related Models

• Seiko 4472-669
• Seiko 7187-758
• Seiko 4595-221
• Seiko 4556-986
• Seiko 6688-431
• Seiko 6644-669
• Seiko 3820-702
• Seiko 5632-459
• Seiko 7056-577
• Seiko 6278-906
• Seiko 6656-508
• Seiko 5686-415