Seiko Cal. 4528 - 840

Seiko 4528-840

The Seiko 4528-840 represents an important milestone in Seiko's 1986 lineup. Powered by the 4528 caliber with 28j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-eabadc0a5e22]

Also known as: Tuna, Arnie

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
40mm
Case Thickness
11.3mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
50m
Dial Color
Blue Sunburst
Jewels
28j
Frequency
36,000 bph
Power Reserve
61 hours
Year
1986

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