Singapore will have a whole new set of coins in circulation by the middle of this year. The new coins features five of Singapore's national icons and landmarks - the Merlion, Port of Singapore, Changi Airport, Public Housing and the Esplanade.
The current set of coins featuring different plants was meant to depict Singapore as a garden city.
source:
http://www.channelnewsasia.com/stories/singaporelocalnews/view/1255571/1/.html
In the article, it was mentioned that "MAS says it has been working with public transport operators to ensure that coin-operated machines at MRT/LRT stations are calibrated to accept both the current and new series coins before the launch. " I was wondering which company will be in charged of this "calibration project". Income opportunity for them. =)