Seiko Cal. 4551 - 236

The Seiko 4551-236 represents an important milestone in Seiko's 1965 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-21e770a34177]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Silver

Jewels

23j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1965

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