Seiko Cal. 6635 - 825

The 6635-825 is a sought-after Hand-Winding piece from Seiko's golden era. The Fixed bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-22e4d2dab7af]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Cream

Jewels

31j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1975

Related Models

• Seiko 4566-960
• Seiko 7136-330
• Seiko 7158-543
• Seiko 6161-458
• Seiko 6620-524
• Seiko 6236-251
• Seiko 4583-897
• Seiko 6618-253
• Seiko 5267-365
• Seiko 7097-814
• Seiko 6112-829
• Seiko 5254-946