This design is said to be based on an etching by Peter Fiotner, a Swiss sculptor who lived from 1485-1546. It has winged beasties on a a boat & an oar whose end has a giant bearded devil with horns.
Large figural brass button of Yum-Yum from the widely popular 1885 comic opera The Mikado by Gilbert & Sullivan. An English fascination for all things Japanese spread through the country as trade between Europe & Japan increased dramatically from the 1860s - 1870s. This is one of my favorite buttons because of the intricate details in the panels of the parasol & on the kimono fabric.