An early 19th Century German wood diptych string gnomon dial, the cover with table and place names and latitudes, the inner faces engraved and coloured paper cards decorated in the neo classical manner - 4 1/8in(10.5cm)long; an Augsburg pattern brass equinoctial compass dial by Andreas Vogler, in fitted leather cae- 2½in (6.3cm)long; and a Stockert pattern compass in domed wood case (3)

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An early 19th Century German wood diptych string gnomon dial, the cover with table and place names and latitudes, the inner faces engraved and coloured paper cards decorated in the neo classical manner - 4 1/8in(10.5cm)long; an Augsburg pattern brass equinoctial compass dial by Andreas Vogler, in fitted leather cae- 2½in (6.3cm)long; and a Stockert pattern compass in domed wood case (3)

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