Seiko Cal. 6355 - 640

This Solar model from 1968 features a 41mm Titanium case. It features a Navy dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-ca14b9cf7704]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Titanium

Case Width

41mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

19j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1968

Related Models

• Seiko 5613-919
• Seiko 6139-522
• Seiko 7145-119
• Seiko 0790-554
• Seiko 5249-554
• Seiko 3865-891
• Seiko 6199-374
• Seiko 5630-787
• Seiko 6142-310
• Seiko 6632-383
• Seiko 6391-451
• Seiko 6139-471