Seiko Cal. 3821 - 557

The Seiko 3821-557 represents an important milestone in Seiko's 1975 lineup. Powered by the 3821 caliber with 36j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-8b381c46b286]

Also known as: Navigator, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

38mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Black

Jewels

36j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1975

Related Models

• Seiko 6662-587
• Seiko 6619-499
• Seiko 3876-411
• Seiko 5297-288
• Seiko 4591-403
• Seiko 3849-247
• Seiko 5244-595
• Seiko 4569-999
• Seiko 4541-614
• Seiko 4513-545
• Seiko 6320-875
• Seiko 6143-521