I am tending to agree with Sue on this one, despite all the non-standard things about the vase. But that is what experimenting is all about and I am sure a lot of unrecorded stuff was produced in 1973. We really need IOW Studio Glass to comment, but maybe only Elizabeth Harris can remember what happened that long ago. Timothy Harris would be a teenager in 1973 and it may be asking too much for him to comment.
Anton