The Bonhams Spring Stafford Sale, scheduled for 25/26 April has been postponed until 12/13 June.
The sale will still take place at the Staffordshire County Showground, alongside the deferred 40th International Classic MotorCycle Show.
Ben Walker, Global Head of Bonhams Motorcycles, said: “We fully respect the decision of Mortons to postpone the International Classic MotorCycle Show.
“Bonhams is committed to the safety and well-being of our clients and staff and would like to reassure them that we are working closely with Mortons and are constantly monitoring the situation.”