Very nice condition strap, Used for carrying extra load.

In principle, this item is a Yoke, rather on the lines of a milkmaid’s. It comprised two long straps, with flared shoulder-pieces, which were folded flat, at right angles and stitched to a connecting piece of 2-inch wide webbing. The flares were either reduction-woven, or made up in sections (as here), which were sewn together in several ways, here a “wrap-around” being used, as opposed to the simpler “sewn-to”. This was off-set towards the rear of each flare, ensuring that the connecting piece lies behind the neck.  Laid flat, the four straps splay out and the folding of the Brace elements means the outside face of one half becomes the inside face of the other half. Part-way down, 1-inch buckles on long chapes are stitched to the Braces, which allow the running ends to be doubled back and fastened. Various items could be carried using the Harness - ammunition boxes, mortar round carrying tubes, etc..