“Auctioned by Christies, London, UK, Oct. 31, 1987.”
http://www.warbirdregistry.org/spitregistry/spitfire-br601.html

Ah yes! The Warbird Registry. Not my first port of call for accurate data. 🙂

My photo is dated on the reverse – 31 October 1986.

Attached a page from Flypast November 1986 issue.

Mark