Seiko Cal. 6686 - 648

This Spring Drive model from 1970 features a 43mm PVD Black case. It features a Green dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-bdfe329deafb]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

22j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1970

Related Models

• Seiko 5666-419
• Seiko 4521-319
• Seiko 6154-690
• Seiko 6385-214
• Seiko 5646-488
• Seiko 6192-696
• Seiko 6144-740
• Seiko 6615-904
• Seiko 5240-275
• Seiko 6320-575
• Seiko 6291-270
• Seiko 6321-786