i dunno if i've seen one in real life, but for 70 quid, that stem doesn't look all that special, imo. (i mean in terms of actual looks, not performance). rusty bolts too...
I have the Deus in something like 110mm as OE on my Anthem and it does look reasonably smart - but the nice side dimple is more noticeable on the longer stems than the one in that pic.
I wouldn't drop 70 notes on a stem if I was buying myself though, and god knows how bike testers assess the performance of a stem in tests like this.