細節
A 19th-Century Stockert-pattern wood diptych dial,
with string gnomon, the printed paper surfaces engraved and coloured with neo classical decoration, the cover with paper table of latitudes (very worn) -- 3¼in. (8.2cm.) long
with string gnomon, the printed paper surfaces engraved and coloured with neo classical decoration, the cover with paper table of latitudes (very worn) -- 3¼in. (8.2cm.) long