Seiko Cal. 0721 - 540

The Seiko 0721-540 represents an important milestone in Seiko's 1969 lineup. It features a Cream dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-6c8807a05928]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Cream

Jewels

30j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1969

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