I was talking to someone today about this pen I have had for quite sometime but never saw another one, then I thought maybe someone here knows about it.
I know now it was produced in Japan from the mid twenties to the mid fifties. The three letters of the name should mean Sea, Sky and Star (although that would be in English of course) It is an eyedropper and when I first saw it I did not think it was a pen. It is very light. It took me some time to open it (a hair drier heat).
Any information will be welcomed.