Seiko Cal. 4520 - 439

Released in 1986, the Cal. 4520 with design code 439 was part of Seiko's domestic market collection. Powered by the 4520 caliber with 27j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-188ad458451a]

Also known as: Helmet, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1986

Related Models

• Seiko 6131-167
• Seiko 5683-100
• Seiko 7110-453
• Seiko 5657-679
• Seiko 6357-955
• Seiko 6626-142
• Seiko 6317-335
• Seiko 6641-287
• Seiko 3894-100
• Seiko 5626-314
• Seiko 5245-343
• Seiko 6225-909