Fine Irish 18K gold watch with power reserve display Circa 1868

Gold open faced lever watch 
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A fine Irish 18 carat gold open faced pocket watch with power reserve display, circa 1868. ¾ plate English lever escapement with double-cut gold screw bimetallic balance and diamond endstone, free-sprung blued balance spring signed John Lowry Belfast.
White enamel dial with Roman numerals and outer minute track, up & down display for 30h power reserve, subsidiary seconds at 6 and original gold hands.
Gold polished case and band,  case maker’s punch mark AS (Alfred Stram).
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Diameter: 52 mm
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Weight: 115 g
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Signed: John Lowry Belfast
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John Lowry was born in Drumbo on 11 August 1811 and was a fairly well-known chronometer and watchmaker in Belfast’s High Street between 1849 and 1880. He received his training as a watchmaker in London.
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Reference 0018000