Seiko Cal. 6390 - 227

The Seiko 6390-227 represents an important milestone in Seiko's 1975 lineup. It features a Burgundy dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-9b671e002ef8]

Also known as: Tuna, World Timer

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

22j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1975

Related Models

• Seiko 3897-168
• Seiko 4470-202
• Seiko 4551-100
• Seiko 0773-576
• Seiko 6348-201
• Seiko 0793-233
• Seiko 6150-517
• Seiko 4485-139
• Seiko 6323-968
• Seiko 5235-927
• Seiko 7116-112
• Seiko 7141-730