Seiko Cal. 7078 - 503

The 7078-503 is a sought-after Hand-Winding piece from Seiko's golden era. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-0b5a8ac77ae5]

Also known as: Sumo, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

19j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1972

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