Swiss deck watch in a steel open faced case Circa 1970

Stainless steel deck watch
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A Swiss deck watch in a stainless steel open-faced case, circa 1970. Split three-quarter plate keyless 17 jewel movement with going barrel. Plain cock with polished steel regulator, plain three-arm balance with blue steel spiral hairspring. Club foot lever escapement. Signed white enamel dial with subsidiary seconds, black Arabic numerals for the hours 1 – 12, and small red numerals for 13 – 24. Small Arabic numerals for each of the minutes, the 5-minute markers in red and blue steel hands. Plain stainless steel case with screw on back and bezel.
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Diameter: 52 mm
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Signed: Helvetia