Seiko Cal. 6138 - 255

The Seiko 6138-255 represents an important milestone in Seiko's 1975 lineup. Powered by the 6138 caliber with 21j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-e623f52790ee]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1975

Related Models

• Seiko 6367-516
• Seiko 3844-579
• Seiko 6149-190
• Seiko 6165-246
• Seiko 7088-667
• Seiko 6312-996
• Seiko 3848-238
• Seiko 6261-676
• Seiko 6180-484
• Seiko 6375-667
• Seiko 0785-851
• Seiko 6331-968