Seiko Cal. 6681 - 310

This Quartz model from 1970 features a 36mm Two-Tone case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-048ea4dcc797]

Also known as: Bullhead

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

36mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1970

Related Models

• Seiko 5251-314
• Seiko 6639-954
• Seiko 6111-515
• Seiko 7049-977
• Seiko 5238-417
• Seiko 6129-477
• Seiko 7029-144
• Seiko 7035-619
• Seiko 6656-570
• Seiko 4494-205
• Seiko 4439-163
• Seiko 6247-251