Seiko Cal. 6636 - 578

This Solar model from 1988 features a 42mm PVD Black case. The Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-0cc88028bc72]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

42mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1988

Related Models

• Seiko 6683-876
• Seiko 6327-423
• Seiko 5681-280
• Seiko 5291-565
• Seiko 6320-689
• Seiko 6318-120
• Seiko 0753-787
• Seiko 7057-816
• Seiko 4469-534
• Seiko 6152-313
• Seiko 5692-748
• Seiko 6613-418