Seiko Cal. 0731 - 397

The 0731-397 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 200m of water resistance. [seikata-wm-ad300c0d241d]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Burgundy

Jewels

36j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1986

Related Models

• Seiko 6237-960
• Seiko 7050-243
• Seiko 7180-332
• Seiko 6656-884
• Seiko 6132-310
• Seiko 6151-795
• Seiko 6634-286
• Seiko 6351-530
• Seiko 6122-687
• Seiko 6182-401
• Seiko 6285-276
• Seiko 6270-966