Seiko Cal. 6257 - 440

The Seiko 6257-440 represents an important milestone in Seiko's 1975 lineup. With its 19mm lug width and 10.0mm profile, it sits comfortably on most wrists. [seikata-wm-0a13bf506523]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1975

Related Models

• Seiko 6671-574
• Seiko 4598-719
• Seiko 6335-128
• Seiko 3868-998
• Seiko 5268-530
• Seiko 6699-339
• Seiko 6696-416
• Seiko 0718-808
• Seiko 6214-801
• Seiko 6340-727
• Seiko 4436-419
• Seiko 4528-516