Seiko Cal. 6311 - 538

This Hand-Winding model from 1966 features a 35mm Two-Tone case. It features a White dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-ae179d64b43f]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

White

Jewels

24j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1966

Related Models

• Seiko 3865-730
• Seiko 6656-130
• Seiko 6111-624
• Seiko 5679-447
• Seiko 7075-172
• Seiko 3858-926
• Seiko 6236-370
• Seiko 5278-160
• Seiko 4459-695
• Seiko 5233-405
• Seiko 5246-834
• Seiko 7169-267