Manufactured in Leeuwarden in the early 1960s in cooperation with Fongers and Germaan who all sold the same moped under their own brand. The Phoenix catalogue for 1964 gives the address as Groningen and states that the firm had been in business for 60 years.
The machines were produced by Germaan, and all three firms amalgamated with Batavus.
Source: Wikipedia NL
N.B. Several firms used the name Phoenix.