Seiko Cal. 7181 - 515

The 7181-515 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7181 caliber with 31j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-2f511e37dc6e]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1977

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