I was only talking to someone about these a week ago. Where did you find it?
I didn't make very many and they were all signed and dated. They were all what I call one off, but now seems to be known as 1/1. Some were nicer than others. I did the spiral (tribal series, incidentally so Aboriginal not far off!) by torch-work, like lamp-work but worked hot onto the hot glass on the iron, from a fine cane. Quite tricky to do and easy to mess up!