If it is Caithness, it's likely to be a second - they wouldn't have passed a weight with one big bubble so much bigger then the others, although I should also say the splodginess of the splodges looks much more splodgy than any Caithness with which I am familiar - apart from the very recent Sara Patterson things - such as the moggie which has appeared at the top of the page here.
(I don't know about you reading that - but typing it got my brain in a spin and made me cross-eyed! :thud: )