Pattern has label with price in cents (South Africa) so was sold post 1961. Estimate date is 1970s due to wear on pattern leaflet and has the same price as pattern #5432.
For dating purposes:
Sirdar Limited, PO Box 31 Wakefield; Sirdar Wools (Pty)Ltd, PO Box 49072, Rosettenville, Johannesburg; Sirdar Wool (Australia) Pty Ltd, PO Box 472, Gouldburn, NSW.