Seiko Cal. 6178 - 688

This Solar model from 1977 features a 45mm PVD Black case. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-040c16a562eb]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

45mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

White

Jewels

28j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1977

Related Models

• Seiko 7131-946
• Seiko 7068-293
• Seiko 3897-872
• Seiko 4441-159
• Seiko 6692-726
• Seiko 5647-418
• Seiko 3859-253
• Seiko 6251-726
• Seiko 6242-830
• Seiko 5623-351
• Seiko 5215-849
• Seiko 6262-358