Yep 99% certain they are Axminster Top ones look like the ones I am looking to buy at the moment, for screwing plywood to and making your own jaws, though I am looking at 100mm and 150mm those look much smaller. Others are are probably C type dovetail jaws.
Stick a price on them and I may be interested, I need to make some custom wooden jaws for one of the ideas fermenting in the dusty corners of my mind, but shape is still a thought in progress at the moment so I haven't a clue on size that I actually need yet....