In Conti v. Board of Civil Service Commissioners (1969) 1 Cal.3d 351, the court at page 359 stated the rule regarding laches as follows: "The defense of laches requires unreasonable delay plus either acquiescence in the act about which plaintiff complains or prejudice to the defendant resulting from the delay . . . ." The Conti case involved a situation in which the trial court granted a writ of mandate ordering the defendant board to reinstate plaintiff to his job with a city agency. The defendant board contended that plaintiff's delay of approximately 11 months from the time of his exhaustion of his administrative remedies until the filing for relief was unreasonable and prejudicial. The Supreme Court held that no evidence was introduced to support a finding that the delay was excusable and reversed the trial court and remanded the case for a determination as to whether laches barred plaintiff's action.