Fun news: the bike was sold at the auction and fetched a nice price. After bidding it went to Per Rasmussen from Bergen, Norway for a price of 15 000 GBP. Our best wishes, the bike has found a good home!
Added below are some pictures of the final signature by Queen Sonja taken by Sven Gjeruldsen of the Norwegian Royal Court. You can find more pictures and some more information about the auction at Sotheby’s website.