I have just received a first day cover dated 1 April 1992 from a collector friend. This was the date when the Telecommunication Authority of Singapore (TAS) was divided into three entities: the new Telecommunication Authority of Singapore, Singapore Telecommunications Private Limited and Singapore Post Private Limited. As the first Public Postal Licensee, Singapore Post can operate postal services for a 15-year period, with an exclusive privilege of receiving, collecting and delivering mail until 31 March 2007.
This piece of history bears the postmark of the official launch of Singapore Post on a 1990 20c Tourism definitive.
