Ruby Swirl is an excellent design IMHO
I have since discovered that reverse swirls do appear on known Chance items, as do the alternating long-short central radial arms. Max's Ruby Swirl dish, featured on the site, shows reverse swirl as well, but this could be a result of printing on the topside (one of the few occurances of this on Chance items).
The overlapping gilt, though, is a little more controversial as Tony is adamant this didn't happen when he worked there and I assumed this could then only apply to earlier (pre-1960) patterns.
However, I have found some later silk-screen printed patterns (c.1965-on) that show the alternating central hole, so I suppose it all depends when this style was adopted and/or when Ruby Swirl was dropped.
I've actually started a bar-graph timeline to try and assimilate all this data!