Seiko Cal. 5231 - 781

The Seiko 5231-781 represents an important milestone in Seiko's 1993 lineup. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-98fcd86e7dd4]

Also known as: Tuna, Arnie

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

35j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1993

Related Models

• Seiko 4598-668
• Seiko 3874-583
• Seiko 4518-292
• Seiko 5624-625
• Seiko 4481-641
• Seiko 7081-236
• Seiko 3848-552
• Seiko 4474-105
• Seiko 5279-831
• Seiko 7017-178
• Seiko 5220-305
• Seiko 5246-361