Seiko Cal. 6613 - 331

Released in 1979, the Cal. 6613 with design code 331 was part of Seiko's domestic market collection. It features a Cream dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-c5da4fd80181]

Also known as: Turtle, Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

60m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1979

Related Models

• Seiko 6133-439
• Seiko 6265-637
• Seiko 4426-361
• Seiko 6329-244
• Seiko 4597-890
• Seiko 3884-973
• Seiko 5640-432
• Seiko 0720-263
• Seiko 0743-945
• Seiko 7082-864
• Seiko 5281-313
• Seiko 7081-210