Seiko Cal. 5240 - 138

The Seiko 5240-138 represents an important milestone in Seiko's 1970 lineup. Powered by the 5240 caliber with 35j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-7c7efedee9e9]

Also known as: Navigator

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1970

Related Models

• Seiko 5635-941
• Seiko 7091-388
• Seiko 5293-729
• Seiko 6180-202
• Seiko 0768-469
• Seiko 6143-439
• Seiko 6354-136
• Seiko 7149-214
• Seiko 6644-567
• Seiko 7024-950
• Seiko 0770-151
• Seiko 7168-713