Seiko Cal. 3856 - 643

The 3856-643 is a sought-after Spring Drive piece from Seiko's golden era. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-e0757e020a05]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1997

Related Models

• Seiko 7021-281
• Seiko 0711-123
• Seiko 6235-199
• Seiko 7189-139
• Seiko 4471-301
• Seiko 6329-329
• Seiko 4519-848
• Seiko 4580-730
• Seiko 7169-554
• Seiko 5299-322
• Seiko 3886-768
• Seiko 6193-280