Seiko Cal. 5251 - 521

The Seiko 5251-521 represents an important milestone in Seiko's 1976 lineup. It features a Navy dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-26306a1a6c6d]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

19j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1976

Related Models

• Seiko 7116-884
• Seiko 6650-986
• Seiko 6250-305
• Seiko 4597-837
• Seiko 6346-451
• Seiko 7061-380
• Seiko 6345-724
• Seiko 6683-153
• Seiko 6396-732
• Seiko 7126-802
• Seiko 6682-447
• Seiko 6125-559