http://www.embacher-collection.com/collection.html
Dorotheum online catalog
My favorite one: 
Which one(s) will you try to buy BSA? 
Oh yes…if I had a bunch of 100€ notes leftover I’d attend the auction… 
My clear favourite is the 5 gear bottom bracket drive of the 50’s-
the Mervil Mervilex 
…and the one of a kind Titanium Moulton is also not that bad…