6 July 1958
There is not very much information about this Exphisalm, except that it is a philatelic exposition which is organised many years (and still is ?) by the Salm Phila Club.
There is nothing that connects Exphisalm with Expo 58. I am open to get additional information about Exphisalm of 1958, so that I can try to connect it to Expo 58.
The following philatelic items have been published during the happening:
Official cover of the happening:
Other cover (r) (publisher ?)
Many covers exist without any cachet (white cover).