Seiko Cal. 0754 - 550

Seiko 0754-550

The 0754-550 is a sought-after Spring Drive piece from Seiko's golden era. The Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-5dddde5b0f1e]

Also known as: Tuna, Bullhead

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
11.7mm
Lug Width
22mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
90m
Dial Color
Black
Jewels
28j
Frequency
36,000 bph
Power Reserve
65 hours
Year
1978

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