I'm a great fan of your website, especially 1-75 "the superfasts are coming"! Everytime I take a look at those information, I will learn more and more
about this fascinating hobby. Thank you and your friends for doing this for us!

But I have one question: why haven't you added #59B Mercury to the list like #55B. Isn't it also a direct descendant from #55A as #55B from #73A?
Or would it be beyond the scope as there are sooooo many variations on this casting?
regards Peter