A German Stockert pattern fruitwood diptych pattern pocket sundial signed, early 19th century The upper leaf with central column printed with eight positions for the string gnomen from latitude 40 degrees to 56 degrees in two degree increments within hand-coloured laurel pendant swag bordered Arabic chapter ring graduated for the hours 6-12-6 , the lower leaf centred with a glazed four-point compass with iron needle within three circles of hourly graduations for latitudes 45, 50 and 55 degrees and decorative foliate swag and floral motif borders, the exterior labelled with the latitudes for forty-eight European cities, 6cm long.