There are actually two versions of the Sherlock Holmes Baker Street (a.k.a. "XL13") shape; one with a standard double bead-line, one with the center ridge broken up into tiny, decorative panels. This, as you can see, is one of the latter, and the one I personally prefer. It's a small detail, but I think it works very well to make these versions much more distinctive in relation to the other designs of the series as a whole.
- Eric N. Squires