In spring 1963, soon after the effort to incorporate the City of Conejo (subsequently Thousand Oaks) was initiated, the Conejo Valley Days Parade took place. Back then, Thousand Oaks was still an unincorporated town in Ventura County.
Seen in the photo below is what appears to be a 1963 Rambler Classic Cross Country station wagon. The sign on the car indicates it was loaned for use in the parade by Conejo Rambler. Sitting on top of that station wagon is "Mister Buttons the Clown." No word on whatever happened to Mister Buttons the Clown, who does not appear to be wearing a seat belt in this shot.