Seiko Cal. 5634 - 421

Released in 1967, the Cal. 5634 with design code 421 was part of Seiko's domestic market collection. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-581bea00bafc]

Also known as: Helmet, Navigator

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

45mm

Case Thickness

13.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1967

Related Models

• Seiko 3862-625
• Seiko 5656-186
• Seiko 7120-312
• Seiko 6292-795
• Seiko 5262-444
• Seiko 6638-760
• Seiko 6336-255
• Seiko 4569-587
• Seiko 4454-676
• Seiko 0714-671
• Seiko 6627-826
• Seiko 6189-772