Seiko Cal. 6657 - 363

The Seiko 6657-363 represents an important milestone in Seiko's 1973 lineup. The Bidirectional bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-dc13ca93d3ba]

Also known as: Shogun, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Silver

Jewels

23j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1973

Related Models

• Seiko 3863-340
• Seiko 3850-846
• Seiko 7090-820
• Seiko 6331-525
• Seiko 4421-192
• Seiko 4545-235
• Seiko 0783-587
• Seiko 3889-252
• Seiko 6119-184
• Seiko 6110-603
• Seiko 0771-876
• Seiko 4440-680