Seiko Cal. 4530 - 321

The Seiko 4530-321 represents an important milestone in Seiko's 1991 lineup. Powered by the 4530 caliber with 21j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-900d184630b7]

Also known as: Bullhead, Helmet

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

8.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1991

Related Models

• Seiko 6674-835
• Seiko 6111-924
• Seiko 7112-672
• Seiko 7035-596
• Seiko 7087-141
• Seiko 4411-995
• Seiko 5257-857
• Seiko 6274-645
• Seiko 6246-984
• Seiko 4428-232
• Seiko 4420-217
• Seiko 4557-396