Swiss chromed Olympic split seconds chronograph Circa 1961

Open faced pocket watch by Omega
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Rare Omega precision chronograph with split seconds, Olympic Split-Seconds Chronograph, original box and rare certificates, circa 1961.
Chromed plain case, ref. MG 1133 and original red plastic box with strap. Lever movement with chronograph and split seconds, calibre 1130 and high-speed oscillator 36.000 A/h. White dial in excellent condition with Arabic numerals, red and black split seconds, subsidiary dial for the constant seconds, subsidiary dial for the 30min counter and blued steel hands.
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Diameter: 64 mm
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Weight: 216 g
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Signed: Omega