An umimatsu (sea-pine) netsuke of monkeys on a tree trunkLate 19th century
One monkey crouching on the treetop, the second monkey climbing out of a hole on the trunk toward its companion, the eyes inlaid in pale horn; inscribed Tsuchimoto. 6.1cm (2½in).注脚海松彫根付　幹に猿の親子　銘「土本」　19世紀後期

Published:
Earle, Huthart, p.380, no.354.

As the characters Tsuchimoto are roughly scratched onto the base, it is likely they were added at a later date and not to be interpreted as a signature.