Seiko Cal. 4440 - 406

Released in 1978, the Cal. 4440 with design code 406 was part of Seiko's domestic market collection. It features a White dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-c441e9ca55f4]

Also known as: Sumo, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

8.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

30j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1978

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