Seiko Cal. 5638 - 839

The Seiko 5638-839 represents an important milestone in Seiko's 1985 lineup. It features a Silver dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-dd30b48fb779]

Also known as: Tuna, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

14.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Silver

Jewels

20j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1985

Related Models

• Seiko 3877-264
• Seiko 4490-351
• Seiko 0777-341
• Seiko 7010-924
• Seiko 6261-964
• Seiko 5264-216
• Seiko 5655-216
• Seiko 6623-601
• Seiko 4545-878
• Seiko 0736-448
• Seiko 7128-522
• Seiko 7122-492