Austrian rare “K.U.K Kriegsmarine” deck watch Circa 1875

Silver open faced deck watch by Brüder Klumak
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An Austrian rare “K.U.K Kriegsmarine” half seconds deck watch with pivoted detent escapement, circa 1875.
Original silver engine turned case with military identification “K.u.K Kriegsmarine No. 4493/56209”. Chronometer movement with pivoted detent escapement, Glashütte construction with three-quarter main plate and fine adjusting device, chronometer balance with gold screws and platinum screws. Silvered dial with Roman hours, subsidiary Arabic seconds and blued steel hands.
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Diameter: 59 mm
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Weight: 181 g
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Signed: Brüder Klumak Wien
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Only a few of these rarities are known by Gebrüder Klumak. Half seconds chronometers of this quality are otherwise only known from Lange & Söhne in Glashütte.