A German Augsburg pattern gilt brass portable equinoctial compass sundial Ludwig Theodor Muller, mid to late 18th century The recessed compass centre with precise rose and radial lines engraved with German annotations for the four cardinal points beneath glazed panel within octagonal surround engraved with symmetrical foliate scrolls on a matted ground, the hinged open hour circle pivoting against folding curved latitude scale and engraved in reverse III-XII-IX with stylised wheatear half hour markers, the centre with pivoted needle gnomen set on a sprung arbor, the underside of the compass with engraved Elev Poli, Corfu 39 Lion 45, Paris 49 DanZig 54, Moscau 57 Petersb, Stockholm 60 over monogram L. T. M. to lower margin, 5cm (2ins) wide. The exact working dates for Ludwig Theodor Muller appear to be unknown however he is believed to have flourished between 1710 and 1770.