If you enlarge the photo and look at the lower loop there is evidence of the top half of a "B" being cut off. Look at the bottom loop at the point of where the top loop would have joined the bottom loop.....the arc of the loop is not very smooth, it is rather irregular like the top loop has been trimmed off there. It also appears that the top part of the upper loop has been trimmed off at the upright....there is a bump on the left of the upright but the right side is fairly flat.
