Preserved Aberdeen RG1173, fleet number 79, an Albion PM28 with Walker B31R body, built in April 1930 and seen at Duxford Showbus 2004.
Said to be the oldest preserved bus in Scotland, it has been fully restored after years of severe deterioration in a garden in South London and won "Best in Show" at Showbus 2000.

Photo taken by Ian Banks, Sunday 26 September 2004, Duxford
Click here for Ian's Fotopic site