Seiko Cal. 5688 - 636

The Seiko 5688-636 represents an important milestone in Seiko's 1969 lineup. Powered by the 5688 caliber with 22j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-d25fe8bd6565]

Also known as: Tuna, Panda

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Cream

Jewels

22j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1969

Related Models

• Seiko 4422-335
• Seiko 7165-395
• Seiko 4488-746
• Seiko 6320-651
• Seiko 0744-444
• Seiko 6247-846
• Seiko 6667-100
• Seiko 6647-162
• Seiko 3835-693
• Seiko 5610-415
• Seiko 4450-998
• Seiko 6161-714