Seiko Cal. 4421 - 852

The 4421-852 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4421 caliber with 30j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-b1dd2b0792b5]

Also known as: Bullhead, Flighty

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

30j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1991

Related Models

• Seiko 5642-449
• Seiko 6355-661
• Seiko 7189-723
• Seiko 4469-908
• Seiko 3872-490
• Seiko 6222-175
• Seiko 3880-459
• Seiko 7165-705
• Seiko 6232-522
• Seiko 5686-619
• Seiko 7077-214
• Seiko 7076-699