Percival Prince aircraft in Singapore
 

Can anyone enlighten me as to the relationship of Air Taxi Ltd, Singapore Air Service (Pte) Ltd and Saber Air? All these company titles have been associated with three Percival Prince aircraft 9V-BBL, BBM and BBN that were operated from Paya Lebar around 1968/69. What services did they operate? Are there any surviving aircrew/cround crew out there? Any help gratefully received by Percival Prince historian of 35 years.
Tom