Signature 12. Charles Chuka. Governor Reserve Bank of Malawi (2012 - 2017). Security windowed thread with RBM 100. Electrotype 100. Watermark James Frederick Sangala. Front Portrait James Frederick Sangala. Headquarters RBM Lilongwe. Three round dots bottom left hand corner to aid the visual impaired. Back College of Medicine in Blantyre RBM logo. Printer De la Rue.