Depends on the build date. Not a '69 expert but I thought the 69 run into 1970 because the new '70 was released mid year.
The traditional 1969 model year production ended at Norwood on July 11, 1969. Indications are Chevrolet knew by that time production would have to be extended indefinitely due to the failure of the 1970 Camaro quarter panel tooling. 1969 Camaro production resumed on August 11, 1969; the order confirmation numbering sequence [aka body number] was reset to 100001. The last '69 was built the 1st week of November 1969.
I'm sure many of the extended production cars remained in dealer inventory into 1970 but they were titled as 1969 vehicles. The 1970 Camaro intro date was February 26, 1970. They were never referred to as '1970½'.
