Thank you all for the complimentary remarks, the end result is certainly better than I had anticipated, thanks to the splendid artwork.
Yes looks like a gunade to me
I purposely used the term carronade to describe this piece. Gunnade is an American term that was not used by the British contemporaneously, they do not seem to have used a single form distinction to differentiate between carronades with, & carronades without, trunnions. Given that the origins of this barrel are British I thought it the appropriate description in this case.
My understanding is that it was recovered from the sea perhaps as long ago as the 1970s, it underwent professional stabilisation & treatment & then languished for quite some time as the owner (a finance company) fell upon hard times & disolved. It was recovered from the state of Tasmania, near its capital city Hobart - practically the southern most part of Australia & near to Port Arthur, one of the first settlements there & famous for its early convict past. I believe that it is a 9 pr & unfortunately there are no visible markings, even though it has come through its ordeals in quite good condition. I am pleased to note that its muzzle includes a flash rim, designed to keep the muzzle blast exiting forwards as much as possible which was important when firing such short ordnance from ships without risk of scorching to the ships many flamable components. I have not had time to properly research it yet though I doubt that, given that it is a commercially made piece, there is much to be discovered.
I've managed to find some more images that I took not long ago:
