Seiko Cal. 6391 - 436

The 6391-436 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6391 caliber with 21j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-7cf704a006cd]

Also known as: Turtle, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

13.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1992

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