Seiko Cal. 6630 - 439

The 6630-439 is a sought-after Spring Drive piece from Seiko's golden era. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-44abe051cbbb]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1969

Related Models

• Seiko 6643-329
• Seiko 6628-473
• Seiko 3889-333
• Seiko 4514-178
• Seiko 6112-855
• Seiko 3895-677
• Seiko 6387-776
• Seiko 3869-212
• Seiko 4425-713
• Seiko 4454-135
• Seiko 0771-647
• Seiko 4518-855