Ultimate accessory for my MP marked Long Branch No4

[No4Mk1(T)]

LOL I knew I was going to catch flack for how I mounted the sling (which is why I added my comment in the original post) but I guess I should have picked a better way of doing it as I feel it has now taken away from the significance of the marking. My main objective in posting the picture was to document an accessory for MP marked Long Branch No4's I've not seen before online.
I agree this is a marking that could easily be faked. As to this one I know the original source and the person from whom I purchased it. It was in the original owners collection since the mid 70's and the person I purchased it from isn't knowledgeable enough about Enfields to be able to fake it (plus he's an honest and trusted friend). This sling was mounted on a rifle and its significants wasn't known until I pointed it out.