Seiko Cal. 7181 - 505

The Seiko 7181-505 represents an important milestone in Seiko's 1977 lineup. Powered by the 7181 caliber with 21j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-e495e3a4bafe]

Also known as: Monster

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1977

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