Seiko Cal. 7078 - 540

Seiko 7078-540

The 7078-540 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7078 caliber with 25j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-15a3f62108fe]

Also known as: Tuna, Rally

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
11.5mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
150m
Dial Color
Silver
Jewels
25j
Frequency
36,000 bph
Power Reserve
68 hours
Year
1967

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