Seiko Cal. 5641 - 633

The 5641-633 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5641 caliber with 18j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-8a6f53e18cdf]

Also known as: Shogun, Emperor

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

43mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1978

Related Models

• Seiko 0767-999
• Seiko 5250-745
• Seiko 6147-140
• Seiko 6191-133
• Seiko 6273-287
• Seiko 5274-703
• Seiko 0729-806
• Seiko 6196-287
• Seiko 3817-969
• Seiko 4453-552
• Seiko 7099-703
• Seiko 0744-296