Seiko Cal. 4531 - 630

Released in 1991, the Cal. 4531 with design code 630 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-a06ce6db3a62]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1991

Related Models

• Seiko 4515-966
• Seiko 6281-877
• Seiko 5285-993
• Seiko 6360-161
• Seiko 6695-314
• Seiko 6237-279
• Seiko 5697-819
• Seiko 6635-130
• Seiko 6235-872
• Seiko 6113-141
• Seiko 5272-129
• Seiko 6223-147