Rare Swiss brass open faced deck/pocket watch Circa 1915

Brass watch in a special wooden box
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Extremely rare Pocket watch/deck watch by Philippe 181967 , observation chronometer movement with transport case and wooden box, circa 1915.
A double sided glazed transport brass case, Patek Philippe Chronometer movement with Guillaume balance and moustache lever, fine regulation, wolf’s toothing.
Original silvered dial and original blued steel hands, good working, in a special wooden box with velvet chemise, extremely rare.
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Diameter: 62 mm
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Signed:  Patek Philippe   Genève
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Only a few of these watches are known. The movement with the number 198081, also only with transport case, was auctioned in Geneva in 2016.