You have some unusual boxes and brands in the first few photos. We never really got Lasonic or Conion over here. The only Unisef I remember seeing was a small shoebox style recorder a schoolfriend got in about 1975. Sony, Panasonic, Toshiba, and JVC were very common here although most shops only stocked the small and middle size boxes.
Not bad, Not bad at all.. Which one you are actually listen to??? 550 was my favorite (right after Sencor Swiss-Beauty I bragged about here...) Toshiba?????? I just Must get me one... or not?