The Mark 4 series 50 Plus, 120, and 200 Plus heads first appeared in around 1972 to 1973 in the US (see the "Dallas Arbiter" catalog pages) and as eary as 1970 in England (see "September 1970" advertisement on the Related Links page), and continued to be sold by DMI.
To ID plate απο πισω γραφει 7573.
Υποθετω οτι ειναι καπου εκει μεσα =ρ
Ps: Οχι δεν εχει αλλα το'βαλα εγω με στυλο απο πανω!
