1972年新加坡伍拾圆一组3枚,「兰花系列」,吴庆瑞签,均EF-AU。Singapore, a group of 3x $50, ND(1972), A/16 892547 and 548 and A/17 694949, blue and multicoloured, orchid at centre, red seal at bottom, Clifford Pier on reverse,(Pick 5b), the consecutive almost uncirculated, the other about extremely fine, signed by Goh Keng Swee (3)