Seiko Cal. 7157 - 540

Released in 1966, the Cal. 7157 with design code 540 was part of Seiko's domestic market collection. Powered by the 7157 caliber with 21j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-d578d5aab42c]

Also known as: Tuna, Bellmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

42mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1966

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