Seiko Cal. 0742 - 257

Seiko 0742-257

The 0742-257 is a sought-after Spring Drive piece from Seiko's golden era. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-9b09a03d76c5]

Also known as: Helmet, Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
12.2mm
Lug Width
22mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
140m
Dial Color
Blue Sunburst
Jewels
30j
Frequency
28,800 bph
Power Reserve
51 hours
Year
1992

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