From what I found out, the Zam Buk company came into existence in the early 1900s – in Yorkshire. This balm became “an essential item for the home” before modern medicine took over. (more can be read here)
I don’t know when Zam Buk became popular in Malaya, but I know that some of my relatives swear by it – we still use it now and then! Just wondering, was this balm as famous as ‘Tiger Balm’?