Seiko Cal. 5640 - 854

The 5640-854 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5640 caliber with 29j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-a40031eb5c8b]

Also known as: Bellmatic, Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

44mm

Case Thickness

8.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Champagne

Jewels

29j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1979

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