SABER (not Sabre) Air is an outfit founded in the 60s with motley fleet of C47s, Twin Otters and several light Cessnas and Pipers, operating mostly charter flights for the oil industry in the region.
In 1969, the Singapore Government took over 80% shares of Saber in an attempt to control the civil aviation industry in Singapore. In 1971, Saber started Singapore-London route with DC8-61 on leased from ONA. However the relationship between ONA and Saber didn't last long, and at the end the DC8 was replaced with B707 from BCal.
In 1973, after the break-up of MSA into Singapore Airlines and Malaysia Airlines, the Singapore Government decided that Singapore Airlines was the chosen flag carrier for Singapore and closed down Saber for good.