Seiko Cal. 0721 - 397

The 0721-397 is a sought-after Automatic piece from Seiko's golden era. Powered by the 0721 caliber with 25j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-9895f959e7e7]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Cream

Jewels

25j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1972

Related Models

• Seiko 4538-861
• Seiko 7025-797
• Seiko 4547-161
• Seiko 6350-224
• Seiko 6258-258
• Seiko 4579-333
• Seiko 6293-967
• Seiko 4435-835
• Seiko 5668-917
• Seiko 6118-247
• Seiko 6134-688
• Seiko 6664-939