Seiko Cal. 4440 - 820

Released in 1969, the Cal. 4440 with design code 820 was part of Seiko's domestic market collection. Powered by the 4440 caliber with 33j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-af226bb79fc7]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

70m

Dial Color

Black

Jewels

33j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1969

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