A rare ivory slab netsuke

A rare ivory slab netsuke
Edo period (1615-1868), 19th century
Of irregular oval form, finely engraved in kebori with a lake scene, showing temples and other buildings on rocky promontories, sailing boats and fishermen on the water and two poems above extolling the beauty of the Ama-no-hashidate Bridge, one in delicate sosho script, the other in kanbun (classical Chinese), another poem on the reverse; inscribed Wataoka-shi. 8.2cm (3¼in) high.