Senna fever continues abated with an astonishing £40-50,000 estimate being put on one of the three-times world champion's helmets.
The lid – bought direct from Ron Dennis by the vendor and complete with a letter of authenticity from McLaren – is to be sold at Silverstone Auctions' Race Retro sale on 25 February.
A Senna race suit, also from the 1991 championship year, has a guide price of £20-30,000.
Guy Loveridge, Silverstone Auctions' Automobilia Consultant, said: "We believe this to be the first time this century that a fully authenticated and certified Senna helmet and race suit have been offered for public auction.
"Not surprisingly we expect interest to very strong for both items due to the current boom in interest and memories of Ayrton Senna. Both lots come from an extensive private collection, along with a selection of other items, including a Jochen Rindt trophy and one of Gerhard Berger’s used crash helmets, make this automobilia auction one not to be missed by motorsport enthusiasts."
James Elliott is a former Editor of Classic & Sports Car