Hi Bojan,
my best guess about your tsuba:
#1 Kinai (記内), daikon no zu tsuba - 大根図鐔
#2 Owari (尾張) or Kyō-sukashi (京透), itomaki sukashi tsuba - 糸巻透鐔
#3 if not cast it could have been an Akasaka tsuba
#4 Nanban (南蛮), unryū no zu tsuba - 雲龍図鐔
#5 Heianjō (平安城)
#6 more Hizen (肥前) than simply Namban, ryū ni shachihoko karakusa sukashi tsuba - 龍に鯱唐草透鐔
Bye, Mauro