Seiko Cal. 7136 - 540

The 7136-540 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7136 caliber with 17j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-d011d570713e]

Also known as: Turtle, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

90m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1973

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