Seiko Cal. 5640 - 244

This Solar model from 1989 features a 39mm Titanium case. It features a White dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-b80666c09c68]

Also known as: Sumo, Silverwave

Specifications

Movement

Solar

Case Material

Titanium

Case Width

39mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

White

Jewels

17j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1989

Related Models

• Seiko 7036-591
• Seiko 6173-405
• Seiko 7124-878
• Seiko 6357-895
• Seiko 0736-303
• Seiko 6675-939
• Seiko 7087-690
• Seiko 4464-382
• Seiko 5673-224
• Seiko 4478-932
• Seiko 4548-830
• Seiko 6161-176