Seiko Cal. 4540 - 850

The 4540-850 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4540 caliber with 17j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-e9b2e368f6a5]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Champagne

Jewels

17j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1978

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