Three ivory and one bone figure netsuke

Three ivory and one bone figure netsuke
Edo period (1615-1868), 18th to 19th entury
The first of Seiobo standing, holding a basket of peaches and staff, unsigned, 7.9cm (3 1/8in) high; the second a sennin turning to the left and holding a large gourd over his shoulder, unsigned, 8.9cm (3½in) high; the third of walrus tusk, of Jurojin standing, holding a staff and with a crane at his side, unsigned, 8.2cm (3¼in) high; the fourth of bone, in the form of Kan'u standing, holding a polearm with one hand and his beard with the other, unsigned, 9.5cm (3¾in) high. (4).