The luxury foreign car with "fake license plates" driven by Moon Se-gwang

‌The starting point for the conspiracy theories surrounding the August 15th assassination attempt was the 1989 conscientious declaration by Lee Kun-woo, who was then the head of the forensic investigation unit at the Seoul Metropolitan Police.
He raised five major suspicions through the media, which are almost on the same level as Baek Hae-ryong's.
I will introduce one of the suspicions he raised.
Claim: Inspector Lee discovered another suspicion during the crime scene investigation. The fact was that the luxury car Moon Se-gwang arrived in was a vehicle with fake license plates.
The black sedan Moon Se-gwang arrived in, bearing the plate 'Seoul 2-Ba 1091', was a Ford 20M, a luxury car that an ordinary citizen could not even dream of owning. Inspector Lee called the vehicle registration office to ask who owned this vehicle.
However, the registration office replied, "That license plate number is not registered." To this, Inspector Lee re-inquired, saying, "What? If that license plate isn't registered, then... are you saying it's a fake plate? Please check one more time," but the result was the same.
Fact: While the Ford 20M was a luxury car, it was also used as a taxi. Since it was used as a taxi, it is not strange at all that Moon Se-gwang rode in a Ford 20M. One must ride a luxury car to act like a VIP, and although the Ford 20M was a taxi, it had no taxi markings. On the day of the incident, August 15, 1974, Moon Se-gwang requested a vehicle from the Chosun Hotel, and the hotel provided the Ford 20M with plate number Seoul 2-Ba 1091.
According to reports at the time, this vehicle had arrived at the hotel carrying other guests, and the owner was the famous Kim Sa-bok (the driver was Mr. Kim Sa-bok's assistant driver). He is the same person as the protagonist of the famous May 18th movie 'A Taxi Driver'. In 2017, Kim Sa-bok's son testified, “My father operated a total of three cars. Two with white plates and one with a green plate. I remember the numbers as 1091, 1092, and 8484.” "Not registered," my foot...