Seiko Cal. 5240 - 856

The 5240-856 is a sought-after Solar piece from Seiko's golden era. Powered by the 5240 caliber with 23j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-a7adcea0ea65]

Also known as: Bullhead

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Black

Jewels

23j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1970

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