Unfortunately unlike the jump the gun version it’s not a full on jumper and doesn't have those buttons on the shoulder which I quite like the idea of (even if I’ve not yet had the chance to wear one) but it’s a great-looking alternative.
As anybody who knows anything will tell you, John Smedley is the oldest manufacturing company in pretty much the world and they’ve been going since about the start of the industrial revolution. It's premium piece I know - it's available on the website, but I got mine via Atom retro. It’s listed there for about £95.
I had credit however (I sent a suit back and they’d run out, so couldn’t exchange) so I got this baby for the bargain basement price of about £8.
The JS site itself is sending them out at the now-cut price of £75 – but they’ve run out of smalls, so I suspect they’re getting towards the end of the run on this one.