Seiko Cal. 7131 - 821

The Seiko 7131-821 represents an important milestone in Seiko's 1969 lineup. It features a Silver dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-89da29dbdabf]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

38mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

40m

Dial Color

Silver

Jewels

33j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1969

Related Models

• Seiko 4457-652
• Seiko 3855-186
• Seiko 6193-649
• Seiko 7129-397
• Seiko 6119-688
• Seiko 6681-443
• Seiko 0714-159
• Seiko 3813-491
• Seiko 7123-409
• Seiko 0797-352
• Seiko 6654-939
• Seiko 0761-524