Seiko Cal. 6390 - 525

The 6390-525 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6390 caliber with 35j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-6d5f1dbcbcfe]

Also known as: Monster, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Navy

Jewels

35j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1976

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