Seiko Cal. 6635 - 997

This Spring Drive model from 1971 features a 34mm PVD Black case. It features a Burgundy dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-db41c6ff8339]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

9.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Burgundy

Jewels

23j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1971

Related Models

• Seiko 6194-201
• Seiko 4571-232
• Seiko 6676-315
• Seiko 5666-606
• Seiko 6654-665
• Seiko 0728-348
• Seiko 0766-192
• Seiko 0792-743
• Seiko 6355-873
• Seiko 5684-394
• Seiko 7199-882
• Seiko 7042-626