Seiko Cal. 6639 - 375

Released in 1976, the Cal. 6639 with design code 375 was part of Seiko's domestic market collection. It features a Silver dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-51a3aef748dd]

Also known as: Turtle, Pogue

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1976

Related Models

• Seiko 6164-289
• Seiko 7060-972
• Seiko 6188-530
• Seiko 3816-841
• Seiko 6659-904
• Seiko 6319-792
• Seiko 6181-148
• Seiko 3874-641
• Seiko 6652-119
• Seiko 6195-234
• Seiko 4412-761
• Seiko 6384-896