Prominent classic car dealer and businessman Egbertus “Bert” Scheepers has been missing since May 9.
The 65-year-old, was last seen on Thesen Island in Knysna, police said CCTV footage shows him arriving home, but never leaving.
Scheepers owns the House of Classic and Sports Cars in Main Road, Knysna.
All of his 120 vehicles are accounted for, and the Mercedes he was driving on the day of his disappearance is still parked at his house.
Search efforts are underway with the help of a Search and Rescue K9 Unit.
CCTV footage reveals that Scheepers left his home at 8am on the morning of his disappearance, before returning to the island later that same day.
He has not been seen since then, and his personal belongings were all found in his home after he was reported missing the next day.