These items are most unlike anything I've seen made by Colin Heaney. I have a dozen or so of his pieces, mostly smaller ones. He made studio glass from 1983 to 2010 in a studio at Byron Bay, the most easterly town in mainland Australia (just 30 mins drive from here). Almost his works are engraved with a signature, either his own name or CBHg for Cape Byron Hot Glass, the name of the studio. The few exceptions of genuine Colin Heaney items I've seen without signature are typically components of larger assembled works that somehow came into circulation as individual pieces.
BTW, it really is best if you can shrink the photos and upload them to the board. That way they are preserved with the commentary for future reference.
Trevor