Seiko Cal. 5646 - 406

This Solar model from 1970 features a 40mm Hardlex-Coated Steel case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-b93edc682060]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1970

Related Models

• Seiko 7113-727
• Seiko 5634-190
• Seiko 4521-643
• Seiko 5665-970
• Seiko 6398-726
• Seiko 6286-209
• Seiko 6131-881
• Seiko 4410-107
• Seiko 7153-755
• Seiko 6136-716
• Seiko 5627-728
• Seiko 6143-674