Seiko Cal. 6631 - 654

The Seiko 6631-654 represents an important milestone in Seiko's 1972 lineup. It features a White dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-256c3fd54aa9]

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

44mm

Case Thickness

12.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

White

Jewels

30j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1972

Related Models

• Seiko 4450-690
• Seiko 7193-516
• Seiko 5611-594
• Seiko 3816-246
• Seiko 7059-123
• Seiko 7116-136
• Seiko 0775-313
• Seiko 4566-405
• Seiko 7023-916
• Seiko 5245-351
• Seiko 5221-913
• Seiko 3821-171