Seiko Cal. 6231 - 257

The Seiko 6231-257 represents an important milestone in Seiko's 1981 lineup. Powered by the 6231 caliber with 23j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-149bb60b4442]

Also known as: Monster, Rally

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1981

Related Models

• Seiko 5231-350
• Seiko 7085-872
• Seiko 7057-629
• Seiko 6655-988
• Seiko 6190-791
• Seiko 0740-794
• Seiko 5262-797
• Seiko 7025-964
• Seiko 4523-831
• Seiko 5227-350
• Seiko 5248-692
• Seiko 7156-473