Seiko Cal. 3831 - 634

The 3831-634 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Silver dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-53459036bd4e]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Silver

Jewels

31j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1978

Related Models

• Seiko 5251-733
• Seiko 7058-906
• Seiko 3818-527
• Seiko 7177-972
• Seiko 4457-138
• Seiko 5257-961
• Seiko 6346-191
• Seiko 6616-834
• Seiko 4589-874
• Seiko 5258-506
• Seiko 6220-496
• Seiko 7075-530