Kutani hand painted tea set

This Japanese Kutani bone china complete 6 person tea setting is hand painted in gold. The tea cups feature lithoplanes of geisha girls, clearly visible when held up to the light. Set consists teapot, sugar bowl, milk jug, 6 cups, 6 saucers and 6 side plates.
It was left to me by my mother, could have been a wedding gift back in the early 50's. It was wrapped in newspaper from 1975, but research on the signature suggests it is from early to mid 1900s. the geisha girl lithoplanes were popular around WW2. Any more info and estimate of worth would be much appreciated. Location: Sydney, Australia.