I think no stop on the reverse might be more a variety than an error, but regardless it still helps the price. Those are two very different things going on with it so hard to say how it affects the value because you can look at it as both increase the price, or one cancels out the other.... and that's why it's another example of what we often say.... which is it's worth what someone is willing to pay. And obviously the wear and edge damage deducts from the over all value. Now had it been as sharp as the picture you posted of the other example it would be a lot more interesting.