I have just seen this thread and most enjoyable. Now I know why I have been dreaming about sawing off my first wife's head, anyway drag straps. I have seen quite a few over here in Europe and often the ersatz and cloth examples have a pink stamp, not unlike the pink stamp inside a Brodie helmet. a tell tale sign is also the buckle, all WWI examples have the lengthening buckle inverted ie as a u shape if that makes sense. My leather example has EB stamped deep into the leather, but although in several places, I am not convinced it is a maker but perhaps the owner's initials. The second leather example I have seen had no markings but I can borrow it to photo. So count me in on the box full. One very famous collector in France has many but inevitably he will not part with them. I even offered my current wife but alas....
Mark