Seiko Cal. 4540 - 828

The 4540-828 is a sought-after Hand-Winding piece from Seiko's golden era. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-da20ead81a58]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

11.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Burgundy

Jewels

19j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1984

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