Seiko Cal. 6635 - 618

This Spring Drive model from 1967 features a 35mm Two-Tone case. The Inner Rotating bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-40a3c6072208]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

15.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1967

Related Models

• Seiko 6396-778
• Seiko 3899-702
• Seiko 3867-544
• Seiko 4463-339
• Seiko 6646-286
• Seiko 7023-345
• Seiko 6142-145
• Seiko 0783-695
• Seiko 0742-999
• Seiko 6282-473
• Seiko 4537-876
• Seiko 0722-194