That’s the one!I was at BP the other day topping up my Amazon account (for the free £5 credit here for anyone interested) and they had a card machine (this one I think) I'd never seen before. Wonder if this is the same as the one you saw. They used to have the terminals where the contactless reader was on the side like @iGeek2014 mentioned.
I did like the contactless on the side though, great for the Apple Watch!