Seiko Cal. 7137 - 660

Released in 1965, the Cal. 7137 with design code 660 was part of Seiko's domestic market collection. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-dfae0cfb63ac]

Also known as: Bullhead, UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

25j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1965

Related Models

• Seiko 4599-281
• Seiko 6337-254
• Seiko 4431-418
• Seiko 3894-924
• Seiko 7051-816
• Seiko 0736-388
• Seiko 4581-562
• Seiko 0755-907
• Seiko 7193-603
• Seiko 4571-678
• Seiko 5222-396
• Seiko 7090-286