Seiko Cal. 4431 - 163

The 4431-163 is a sought-after Solar piece from Seiko's golden era. With its 21mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-a4a2529ea4dd]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

41mm

Case Thickness

13.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Champagne

Jewels

18j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1995

Related Models

• Seiko 6232-730
• Seiko 6253-836
• Seiko 6311-460
• Seiko 7049-155
• Seiko 6122-484
• Seiko 6647-555
• Seiko 6698-643
• Seiko 6347-199
• Seiko 6647-461
• Seiko 6237-195
• Seiko 5250-438
• Seiko 7025-723