Board of Commissioners of Currency, Singapore, an obverse and reverse archival printer’s model for a proposed issue of $50, ND (1988), no serial number, blue and multicoloured, Yusof bin Ishak, the first President of Singapore, at left centre, arms at centre, reverse blue, MRT train at right centre, Hu Tsu Tau signature, typed date ‘3.6.88’ in low margin of card mount, in PMG holders 66 EPQ, gem uncirculated and 63 EPQ, choice uncirculated, unique and attractive (2 notes)
TBB unlisted, Pick unlisted, KNB 15ES S$15,000-S$20,000

This lot was sold as part of a special collection, The Frank Goon Reference Collection of British Malayan Banknotes.

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Collection

In 1990, a commemorative $50 was issued in orange and red with a holographic portrait of Yusof bin Ishak, and it seems likely that design was chosen over the one shown here, making this an interesting insight into the development of the $50 at the time.
This is the KNB plate note