Unless it was re-badged before the Stockholm exhibition, It's not one of the Earl's Court bikes. The Norton name didn't appear ANYWHERE on the bike. Where your photo shows a badge with "Norton" in it was just a green "blob", hemispherical in shape but not full depth. The PR outfit that dreamed up that disaster wasn't around very long.
As I recall the tales we heard in Wolverhampton, the folks at Plumstead Road had about 60 tanks ready to use on the production line and none of them had the required depression for the traditional metal Norton badge. They were originally delivered with a decal that looked like your photo. There was such a stink about it, that, I believe, those tanks were replaced by a redesign that had a depression for a "proper" metal badge, at N-V's expense.
I've never seen the badge example in your photo before. It looks like there is a depression in the tank, but I don't remember seeing the design with the green color above and below the Norton name. The rest of the paint job is identical to the bikes on the Earl's Court stand. I'll bet that the primary chain-case didn't have the Norton logo in it either