Seiko Cal. 5643 - 389

This Quartz model from 1971 features a 38mm Hardlex-Coated Steel case. The Coin-Edge bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-4011ca0ca7ba]

Also known as: Bullhead, Helmet

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Cream

Jewels

23j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1971

Related Models

• Seiko 3886-920
• Seiko 7155-176
• Seiko 0799-223
• Seiko 4413-178
• Seiko 0737-982
• Seiko 6350-524
• Seiko 4462-165
• Seiko 5699-573
• Seiko 5235-282
• Seiko 4559-433
• Seiko 4460-808
• Seiko 6355-243