Seiko Cal. 3891 - 528

Released in 1984, the Cal. 3891 with design code 528 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-fe81015ed697]

Also known as: Helmet, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1984

Related Models

• Seiko 3841-900
• Seiko 6638-308
• Seiko 6281-815
• Seiko 3829-974
• Seiko 7118-249
• Seiko 3818-985
• Seiko 6257-364
• Seiko 4587-817
• Seiko 4493-239
• Seiko 6619-489
• Seiko 7141-791
• Seiko 6288-903