Seiko Cal. 5640 - 333

The 5640-333 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5640 caliber with 36j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-509a6b2e7d72]

Also known as: Sumo, Helmet

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

White

Jewels

36j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1997

Related Models

• Seiko 3852-929
• Seiko 6219-239
• Seiko 7022-408
• Seiko 5281-796
• Seiko 5629-444
• Seiko 7017-147
• Seiko 3899-377
• Seiko 6393-792
• Seiko 6155-562
• Seiko 6287-255
• Seiko 7062-800
• Seiko 5676-431