My other half's mother's sister has this tea service and has no idea where or how old the set is and asked my other half for help with the ID and age of the set.
I unpacked a cup from the set to see if I knew anything, to me it looks like Japanese eggshell, but I am probably incorrect!
Any help in finding out where it is from and the rough age would be most appreciated, then I can give them back the set.