Seiko Cal. 4437 - 691

Released in 1974, the Cal. 4437 with design code 691 was part of Seiko's domestic market collection. It features a Black dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-7f0aa4bbb675]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1974

Related Models

• Seiko 7113-185
• Seiko 5669-908
• Seiko 7186-244
• Seiko 3876-114
• Seiko 6331-530
• Seiko 6132-545
• Seiko 7158-905
• Seiko 4460-683
• Seiko 7056-262
• Seiko 5694-825
• Seiko 4441-951
• Seiko 3880-248