Seiko Cal. 6687 - 970

The 6687-970 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-2f04edbce792]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

11.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

24j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1968

Related Models

• Seiko 7070-734
• Seiko 3820-643
• Seiko 6333-905
• Seiko 0764-444
• Seiko 7178-315
• Seiko 7119-169
• Seiko 7121-246
• Seiko 6619-705
• Seiko 7136-485
• Seiko 4464-489
• Seiko 6155-799
• Seiko 5688-703