Seiko Cal. 5660 - 715

This Hand-Winding model from 1968 features a 37mm Two-Tone case. Powered by the 5660 caliber with 26j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-a0cbf1033127]

Also known as: Turtle, Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Burgundy

Jewels

26j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1968

Related Models

• Seiko 6157-517
• Seiko 6122-553
• Seiko 3874-867
• Seiko 6262-501
• Seiko 6258-848
• Seiko 4532-159
• Seiko 7011-479
• Seiko 6612-513
• Seiko 7179-570
• Seiko 0781-946
• Seiko 7197-470
• Seiko 7159-335