Seiko Cal. 6636 - 264

This Automatic model from 1970 features a 46mm Titanium case. It features a Navy dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-926afc3fade2]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

46mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Navy

Jewels

24j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1970

Related Models

• Seiko 5621-785
• Seiko 4595-552
• Seiko 7023-477
• Seiko 6321-133
• Seiko 4548-507
• Seiko 7089-226
• Seiko 7051-571
• Seiko 6665-847
• Seiko 6287-488
• Seiko 6624-760
• Seiko 4479-710
• Seiko 7149-907