Swiss chronometer with split seconds chronograph Circa 1927

Open faced pocket watch by Jules Jürgensen Watch Co./ Edouard Heuer & Co.
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A very fine Swiss, unusual pocket chronometer with split seconds chronograph, circa 1927. Used during the 1936 Summer Olympics in Berlin.
Silver, tiered, polished case with gold crown, pusher and hinge, pusher for chronograph at “11” and case maker’s punch mark “GS”. Signed enamel dial with radial Roman hours, auxiliary seconds, outer seconds divisions, 60 min. counter, split-seconds chronograph and blued spade hands. Bridge movement, signed, nickel-plated, ground, with 10 adjustments, 34 jewels, finely matted and bevelled chronograph steel parts, ratchet wheel, large gold screw compensation balance and counterpoised lever.
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Diameter: 56 mm
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Weight: 155 g
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Signed: Jules Jürgensen, Copenhagen
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This chronometer was tested at the Teddington observatory in 1928 and rated with 82.4 marks “especially good”. With original Teddington observatory rating certificate, Kew class “A” Especially Good