Seiko Cal. 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

Related Models

• Seiko 7086-303
• Seiko 6131-993
• Seiko 4545-486
• Seiko 0750-402
• Seiko 3878-462
• Seiko 6254-305
• Seiko 0715-297
• Seiko 5245-394
• Seiko 5614-867
• Seiko 4476-520
• Seiko 4484-338
• Seiko 0719-570