Seiko Cal. 4561 - 621

Released in 1975, the Cal. 4561 with design code 621 was part of Seiko's domestic market collection. Powered by the 4561 caliber with 36j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-adefd43fbd82]

Also known as: Sumo, Helmet

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

45mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

White

Jewels

36j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1975

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