Seiko Cal. 7138 - 637

The 7138-637 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 7138 caliber with 17j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-ce4622582fd3]

Also known as: Golden Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

42mm

Case Thickness

10.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1966

Related Models

• Seiko 6665-810
• Seiko 6135-138
• Seiko 5660-622
• Seiko 4544-553
• Seiko 5622-413
• Seiko 7152-582
• Seiko 7095-906
• Seiko 4527-620
• Seiko 0760-935
• Seiko 7151-645
• Seiko 6278-222
• Seiko 3869-922