Seiko Cal. 6311 - 404

This Hand-Winding model from 1966 features a 37mm Hardlex-Coated Steel case. Powered by the 6311 caliber with 35j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-b084d3a61bb1]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

35j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1966

Related Models

• Seiko 5629-481
• Seiko 7087-555
• Seiko 0756-934
• Seiko 5690-992
• Seiko 4432-424
• Seiko 6611-948
• Seiko 5628-536
• Seiko 7117-383
• Seiko 6615-367
• Seiko 3886-624
• Seiko 5641-291
• Seiko 6330-585